The Rise and Fall of American Growth

Buy on Amazon — The Rise and Fall of American Growth

Detailed overview

Robert J. Gordon argues that American growth was historically lopsided: the century from 1870 to 1970 changed ordinary life more completely than the digital era that followed. His baseline is a post-Civil War United States of kerosene lamps, outhouses, horse transport, seasonal diets, hand-sewn clothing, rural isolation, child labor, unsafe milk, high infant mortality, and women hauling water, coal, and wood. His endpoint is an America in which electricity, indoor plumbing, telephones, automobiles, radio, motion pictures, antibiotics, high school, Social Security, Medicare, suburban housing, air conditioning, and the forty-hour week had already become ordinary or close to ordinary.

The book’s first half is built around the diffusion of the Second Industrial Revolution. Gordon keeps returning to the same material test: did an invention alter the house, the street, the farm, the store, the factory, the school, the hospital, and the body? Electricity, internal combustion, running water, sewers, refrigeration, the telephone, and public health did. He therefore treats Promontory Summit, Edison’s light, Bell’s telephone, refrigerated rail cars, Wanamaker’s department store, the Sears catalog, Rural Free Delivery, the Model T, the farm tractor, pasteurization, and the Pure Food and Drug Act as parts of one vast conversion from isolation and drudgery to connected domestic and commercial systems.

Gordon’s major measurement claim is that GDP understates the early revolution more than it understates later change. The point is concrete rather than statistical ornament. GDP does not adequately value the removal of horse waste from streets, the first safe electric light, the end of hauling water for laundry, the move from outhouses to indoor toilets, the fall in infant mortality from 22 percent in 1890 to about 1 percent in 1950, or the ability of rural households to order from a thousand-page Sears catalog. Those are not small improvements at the edge of consumption; they are changes in time, smell, danger, privacy, health, and distance.

The post-1940 chapters are not a dismissal of later technology. Gordon gives serious attention to frozen foods, supermarkets, fast food, synthetic fibers, postwar subdivisions, interstate highways, jet air travel, television, cable, VCRs, CNN, cell phones, iPods, Netflix, BlackBerry, iPhone, mainframes, SABRE, ATMs, barcodes, personal computers, Netscape, Google, Amazon, CT scans, hip replacements, women’s labor-force entry, Sun City, ERISA, and Medicare. His distinction is that many of these changes completed, refined, or narrowed earlier revolutions rather than starting a comparable economy-wide transformation from scratch.

The book’s final third explains the productivity record. Gordon links the 1920-1970 surge in total factor productivity to the delayed payoff of electric motors, assembly lines, and internal combustion, intensified by Great Depression reorganization and World War II government-financed capacity such as Willow Run, aircraft plants, synthetic rubber, radar, and operations research. He then argues that the digital revolution created a real but temporary 1994-2004 productivity revival through web browsers, search engines, e-commerce, digital storage, and paperless offices, after which productivity slowed again despite smartphones, iPads, artificial intelligence, robo-advisers, and driverless-car experiments.

The closing diagnosis separates average productivity from median living standards. Gordon says future median disposable income is held down by inequality, education, demography, and fiscal pressure. Piketty-Saez tax records, Census household income, and CBO after-tax measures show that income growth after the 1970s moved toward the top; union decline, imports, automation, and minimum-wage erosion pressured the bottom 90 percent; student debt and weak schools slowed human-capital gains; baby-boom retirement lowered hours per person; and Social Security, Medicare, and government debt created pressure for taxes or benefit restraint. The result is a book that treats technological history and social distribution as inseparable parts of the same growth story.

Core concepts

Source links

Extracted text

Chapter-by-chapter notes

Preface

Summary: Gordon explains that the book grew from a 1965 MIT summer job on corporate tax shifting, a comparison between low corporate taxes in the 1920s and high corporate taxes in the 1950s, John Kendrick’s 1961 Productivity Trends in the United States, an August 26, 1965 letter to his parents, his PhD dissertation on the output-capital ratio, and a later discovery that World War II government-financed plants for tanks, airplanes, and weapons made measured private capital misleading. He connects this early puzzle to the 2000 Groningen/Maddison “One Big Wave” paper, his “Does the New Economy Measure Up?” essay on dot-com change, the claim that digital productivity gains were concentrated in 1996-2004, and the later headwinds of inequality, education, demography, and fiscal pressure. Source anchors: MIT summer job, John Kendrick, output-capital ratio, World War II plants, One Big Wave, 1996-2004, four headwinds.

Analysis: The preface matters because the MIT summer job, John Kendrick, and output-capital ratio show Gordon beginning from an empirical anomaly rather than from a general complaint about modern technology. World War II plants turn out to be crucial because wartime public investment helps explain why productivity rose without a matching private-capital series. One Big Wave, 1996-2004, and the four headwinds also establish the book’s two jobs: explaining the midcentury productivity peak and explaining why later growth reaches ordinary households more weakly.

1. Introduction: The Ascent and Descent of Growth

Summary: The introduction defines the “special century” from 1870 to 1970 and contrasts it with millennia of negligible growth before industrialization and slower progress after 1970. Gordon names electricity, the internal combustion engine, running water, indoor plumbing, the telephone, the phonograph, motion pictures, and ICT, then explains why 1870 is his starting point through the Census of Manufacturing, Promontory Summit, the transcontinental railroad, and the post-Civil War national market. By 1929, urban America had electricity, automobiles approaching one per household, radio, phonographs, movies, and sharply reduced infant mortality, while the post-1970 period is described as dazzling in entertainment and information but weaker in total factor productivity. Source anchors: special century, electricity, internal combustion, Promontory Summit, 1929 urban America, infant mortality.

Analysis: The chapter fixes the comparison that controls the rest of the book. Electricity, internal combustion, Promontory Summit, 1929 urban America, and infant mortality are not decorative examples; they identify the domains in which Gordon thinks innovation must be judged. ICT is introduced as narrower because it changes communication and information dramatically without repeating the same reach into water, waste, transport, disease, food safety, and household labor. That makes the chapter a Technological Change frame about diffusion and complements rather than invention alone.

2. The Starting Point: Life and Work in 1870

Summary: Gordon presents 1870 as a country with industrial promise but a still harsh standard of living: 40 million people, average household size of 5.3, 59 percent below age 25, 3 percent age 65 or older, 14 percent foreign-born, and a population split among northern and western rural households, the South, and urban America. He uses the Crystal Palace display of the “American System,” McCormick’s reaper, Samuel Colt’s interchangeable parts, James Bryce’s observations, Leland Stanford’s golden spike at Promontory Summit on May 10, 1869, the telegraph message “DONE!,” hog-and-hominy diets, 2.66 million farms averaging 154 acres, southern sharecropping, and a North Carolina woman hauling water and fuel to make the baseline vivid. Source anchors: 40 million, Crystal Palace, McCormick reaper, Samuel Colt, golden spike, hog and hominy, North Carolina woman.

Analysis: The chapter matters because 40 million, Crystal Palace, McCormick reaper, Samuel Colt, and the golden spike show that the United States already had inventive capacity and national connection. Hog and hominy, sharecropping, and the North Carolina woman show why those capacities had not yet transformed most daily work. Gordon needs both sides because the later gains are measured against a society that was technologically ambitious but still bodily exhausting.

3. What They Ate and Wore and Where They Bought It

Summary: Gordon treats food, clothing, and retailing as changes in variety, safety, price, and labor rather than as a simple story of more calories. Food remained near 41-43 percent of spending from 1888 to 1919, calories changed little, the South remained a “Republic of Porkdom,” Muncie households suffered seasonal “spring sickness,” refrigerated rail cars and iceboxes expanded winter food variety, the 1906 Pure Food and Drug Act attacked adulteration, processed foods included canned goods and Coca-Cola, ready-made clothing displaced home sewing, and mass retail came through Wanamaker, Marshall Field, Montgomery Ward, Sears, Rural Free Delivery in 1901, and parcel post in 1913. Source anchors: 41-43 percent, Republic of Porkdom, refrigerated rail cars, Pure Food and Drug Act, Wanamaker, Sears catalog, Rural Free Delivery.

Analysis: The chapter shows why Gordon treats distribution as part of growth. Refrigerated rail cars, the Pure Food and Drug Act, and processed foods changed safety and seasonality, while Wanamaker, Sears catalog, Rural Free Delivery, and parcel post changed access and prices. The Republic of Porkdom and Muncie’s spring sickness keep the chapter anchored in actual diets, so the retail revolution is measured against monotonous food and women’s sewing labor.

4. The American Home: From Dark and Isolated to Bright and Networked

Summary: Gordon’s house chapter follows the move from isolated dwellings to homes connected by electricity, running water, sewers, gas, telephone, central heating, washing machines, and refrigerators. He uses Jacob Riis’s New York tenements, the 1867 tenement law requiring one water closet per 20 people, urbanization rising from 23.2 percent to 56.5 percent, average household size falling from 5.0 to 3.7, 77 percent of 1940 housing stock built after 1900, triple-deckers, bungalows, Edison’s 1879 light, electric appliances, and rural lag in the South to describe uneven but radical domestic change. Source anchors: Jacob Riis, 1867 tenement law, 56.5 percent urban, Edison light, running water, sewer lines, rural South.

Analysis: The chapter gives “networked” a literal meaning through Edison light, running water, sewer lines, gas, and telephone service. Jacob Riis and the 1867 tenement law show the dirt and crowding from which the urban home had to escape, while 56.5 percent urban and rural South identify the unevenness of diffusion. The house becomes a Logistics and Throughput unit: water, waste, light, heat, and messages must move reliably into domestic space before economic growth changes women’s time, privacy, cleanliness, light, and temperature.

5. Motors Overtake Horses and Rail: Inventions and Incremental Improvements

Summary: Gordon moves transportation from railroads, horse omnibuses, cable cars, and electric streetcars to automobiles, trucks, tractors, and roadside commerce. Rail speeds rose from 20-25 mph in 1870, horse omnibuses moved around 3 mph, motor vehicle registrations per household rose from 0.1 in 1900 to 2.3 in 1910, 38.3 in 1920, 89.8 in 1930, and 93.0 in 1940, the United States held 78 percent of world automobiles in 1930, farms had 4.2 million autos, 370,000 trucks, and 450,000 tractors by 1924, Iowa farmers were overwhelmingly motorized by 1926, the Model T became astonishingly affordable by 1923, and new roadside businesses included White Castle, Howard Johnson’s, Sanders’ Servistation, and Dairy Queen. Source anchors: 20-25 mph, 89.8 vehicles, Model T, Iowa farmers, White Castle, Howard Johnson's, Dairy Queen.

Analysis: The chapter explains why the motor vehicle changed space, not only speed. The Model T, Iowa farmers, trucks, and tractors show origin-to-destination movement for households and mechanization for farms; White Castle, Howard Johnson’s, and Dairy Queen show businesses made possible by roadside traffic. The 89.8 vehicles per 100 households by 1930 is crucial because it lets Gordon later argue that postwar automobiles improved an already established way of life.

6. From Telegraph to Talkies: Information, Communication, and Entertainment

Summary: Gordon traces pre-1940 information and entertainment through literacy, books, newspapers, magazines, telegraphy, telephone networks, phonographs, radio, and film. He gives 1870 literacy as 80 percent overall, 88.5 percent for whites, and 20.1 percent for blacks, then black literacy at 88.5 percent by 1940; books rise from about 2,000 titles per year in 1880 to 11,300 in 1940; newspaper circulation rises from 7 million in 1870 to 96 million in 1940; and the chapter names Pulitzer, Hearst, the Yellow Kid, McClure’s, Collier’s, Ladies’ Home Journal, Time, Life, Morse’s “What hath God wrought?,” the 1866 undersea cable, the Associated Press, Bell’s 1876 telephone, Jack Benny, The Wizard of Oz, and Gone with the Wind. Source anchors: black literacy, Yellow Kid, Morse, undersea cable, Bell telephone, Jack Benny, Gone with the Wind.

Analysis: The chapter supplies the mass-media counterpart to the networked house. Morse, the undersea cable, Bell telephone, and the Associated Press connected markets and news; Pulitzer, Hearst, Yellow Kid, Jack Benny, and Gone with the Wind created shared national audiences. Black literacy gives the chapter a social measure, showing that access to print and communication depended not only on inventions but also on schooling after slavery.

7. Nasty, Brutish, and Short: Illness and Early Death

Summary: Gordon argues that the fall in illness and early death came mainly through public health before high-tech medicine. He emphasizes clean running water, sanitary sewers, food safety, refrigerated rail cars, pasteurization, germ theory, insect control, breastfeeding knowledge, and the conquest of infant mortality, then adds sickness funds in 1917, the absence of national health insurance from the New Deal because of AMA opposition, kerosene lamp accidents, railroad fatalities peaking at 11,800 in 1907, the General Slocum disaster of 1904, the Eastland disaster of 1915, motor vehicle deaths, Prohibition-era homicide, and William Nordhaus’s estimate that health gains roughly doubled standard consumption growth in the first half of the twentieth century. Source anchors: clean running water, pasteurization, AMA opposition, 11,800 railroad deaths, General Slocum, Eastland, Nordhaus.

Analysis: The chapter places public health beside income as a core measure of progress. Clean running water, pasteurization, and sewers explain survival through State Capacity rather than miracle cures: municipalities, inspectors, and public-health routines make safer water and food reach bodies. AMA opposition and sickness funds reveal why insurance institutions lagged, while General Slocum, Eastland, railroad deaths, and Nordhaus’s health valuation make risk reduction and longer life central to Gordon’s claim that measured GDP misses much of the special century.

8. Working Conditions on the Job and at Home

Summary: Gordon uses Gary Becker’s home production logic to count work that standard labor statistics often miss, especially women’s household labor. He says more than 80 percent of the 1870 labor force worked in hazardous, tedious, or unpleasant conditions; elderly male participation ages 65-75 was 88 percent in 1870; about half of boys aged 14-15 worked in 1880; farming, domestic service, and disagreeable work later collapsed; tractors and electric-powered factory tools changed production; steel and meatpacking became safer; the Triangle Shirtwaist fire and sweatshops show remaining danger; female labor-force participation ages 25-64 rose from 12 percent in 1870 to 26 percent in 1940 and 72 percent in 2000; and high school graduation rose from 9 percent in 1910 to 52 percent in 1940. Source anchors: Gary Becker, 80 percent unpleasant, 88 percent elderly, Triangle Shirtwaist, female labor force, high school graduation.

Analysis: The chapter converts time, exhaustion, and danger into economic evidence. Gary Becker, 80 percent unpleasant work, and female labor force participation let Gordon count unpaid household production and the release from drudgery; Triangle Shirtwaist, steel, and meatpacking show why safer work matters to living standards. The 88 percent elderly participation and high school graduation figures show the same transformation at the edges of life, as old men and teenage boys were less often forced into immediate labor.

9. Taking and Mitigating Risks: Consumer Credit, Insurance, and the Government

Summary: Gordon ends Part I by following the institutions that helped Americans manage risk and buy durable goods. He covers rural store credit, pawnshops, installment plans, the fact that 75 percent of new automobiles were financed by 1926, fire and life insurance, the standard auto policy of 1935, George Mecherle’s State Farm in 1922, Sears’s Allstate in 1931, Homestead Acts, railroad land grants covering 7 percent of the continental United States, the Morrill Acts of 1862 and 1890, agricultural experiment stations, the Extension Service, the patent system, the Interstate Commerce Act of 1887, the Sherman Act of 1890, the 1911 Standard Oil breakup, Hoover standardization, FDIC, Social Security, unemployment compensation, REA, TVA, WPA, and CCC. Source anchors: 75 percent financed, State Farm, Allstate, Morrill Acts, Extension Service, FDIC, WPA.

Analysis: The chapter shows that the special century needed institutional machinery. The 75 percent financed figure, State Farm, and Allstate show consumer durables and automobile risk being absorbed by Financial Infrastructure at household scale. Morrill Acts, Extension Service, and the patent system explain how knowledge and invention were organized, while FDIC, Social Security, unemployment compensation, WPA, and CCC show State Capacity creating public protections against risks that private markets handled badly.

Entr'acte: The Midcentury Shift from Revolution to Evolution

Summary: Gordon pauses in 1940 to explain that the chronological midpoint sits inside the rapid 1920-1970 productivity period, not at its boundary. He distinguishes IR #1 based on steam, railroads, steamships, iron, and steel; IR #2 based on electricity and internal combustion; and IR #3 based on information and communication technology. He argues that 1870-1940 gains were understated by GDP because statistics missed electric light, processed food, refrigerated meat, department stores, Sears catalogs, the removal of horse droppings, the roughly 80 percent fall in the real price of the Model T from 1910 to 1923, telegraph, telephone, phonograph, radio, Gone with the Wind at twenty-three cents, infant mortality falling from 22 percent in 1890 to about 1 percent in 1950, running water, sewers, indoor bathrooms, and electric washing machines. Source anchors: IR #2, IR #3, horse droppings, Model T price, Gone with the Wind, infant mortality, electric washing machines.

Analysis: The entr’acte explains why Gordon thinks early GDP understatement was enormous. IR #2 changed houses, streets, health, transport, and work, while IR #3 concentrated more heavily in communication, information, and entertainment. Horse droppings, Model T price, Gone with the Wind, infant mortality, and electric washing machines are concrete examples of consumer surplus and welfare gains that did not enter measured output in proportion to their value.

10. Fast Food, Synthetic Fibers, and Split-Level Subdivisions: The Slowing Transformation of Food, Clothing, and Housing

Summary: Gordon begins the post-1940 section with food, clothing, and housing, where he sees abundance but slower transformation. Food changes include frozen foods, supermarkets, fast food, pizza delivery, casual dining, food spending falling from 45 percent of income in 1870 to 13 percent in 2012, and a post-1970 calorie increase of about 20 percent that contributes to obesity, food deserts, and emergency-room reliance among the poor. Clothing changes include the already-completed shift to ready-made garments, casual wardrobes, Walmart, Target, imports, and the decline of domestic textiles; housing changes include baby-boom demand, postwar suburbs, bigger houses, central air conditioning, Consumer Reports appliance quality, Los Angeles density, Detroit decay, FHA redlining, contract financing in Chicago, local property taxes, and school finance inequality. Source anchors: frozen foods, 13 percent food, obesity, Walmart, baby boom, FHA redlining, Detroit decay, property taxes.

Analysis: The chapter demonstrates Gordon’s distinction between plenty and transformation. Frozen foods, Walmart, the baby boom, bigger houses, and central air conditioning are real gains, but obesity, food deserts, FHA redlining, Detroit decay, and property taxes show the costs attached to postwar abundance. The chapter also makes suburbanization a Path Dependence and Institutional Drift mechanism because housing location, highway subsidy, local school finance, and racial separation keep shaping opportunity after the initial postwar building surge.

11. See the USA in Your Chevrolet or from a Plane Flying High Above

Summary: Gordon describes postwar transportation as an improvement of systems whose basic powers had already arrived by 1940. He begins from the 1879 internal combustion engine, 90 motor vehicles per 100 households by 1929, Ford’s mass production, postwar car and truck sales rising from 4.7 million in 1941 to 9.1 million in 1955, two-car families, the interstate highway system built mainly in 1958-72, passenger air miles rising from 9 per person in 1940 to 2,660 in 2013, General Motors, Ford, Chrysler, GM’s 2009 bankruptcy, smog, antipollution rules, seat belts, airbags, automatic transmission, power steering, air conditioning, jet conversion, airline deregulation in 1978, and the decline of intercity passenger rail. Source anchors: 90 vehicles, 9.1 million, interstate highways, 2,660 air miles, GM bankruptcy, seat belts, airline deregulation.

Analysis: The chapter matters because 90 vehicles, 9.1 million sales, interstate highways, and 2,660 air miles show huge postwar mobility while also revealing saturation. Seat belts, smog controls, automatic transmission, and airline deregulation improved safety, regulation, and convenience, but they did not repeat the shift from horse to car. GM bankruptcy and declining passenger rail also show that transport progress came with industrial decline and public choices favoring highways and aviation.

12. Entertainment and Communications from Milton Berle to the iPhone

Summary: Gordon identifies entertainment and communication as the field where progress remained rapid after 1970. The chapter runs from David Sarnoff’s 1939 World’s Fair television and Milton Berle to color TV, cable, satellite, VCRs, DVRs, CNN in 1980, Walter Cronkite, CBS Evening News, 60 Minutes in 1968, newspaper circulation falling from 1.4 per household in 1949 to less than 0.4 in 2010, the 1983 breakup of AT&T, cell phones, texting, BlackBerry, iPhone, iPod in 2001, iTunes, Pandora, Spotify, DVD players, Netflix streaming after 2007, Kindle, e-books, tablets, the 2008 App Store, smartphone news, and social media. Source anchors: Milton Berle, Walter Cronkite, CNN 1980, AT&T breakup, iPod, Netflix, App Store.

Analysis: The chapter gives Gordon the best modern counterexample to his own pessimism. Milton Berle, Walter Cronkite, CNN, the AT&T breakup, iPod, Netflix, and the App Store show undeniable gains in choice, mobility, immediacy, and personalization. The chapter also confines those gains to a narrower part of life than electricity, plumbing, cars, and antibiotics, which is why entertainment and communication can boom while overall productivity still slows.

13. Computers and the Internet from the Mainframe to Facebook

Summary: Gordon treats ICT as the most spectacular price-performance story in the book but limits its economy-wide effect by scope and timing. He compares the 1976 Cray-1 at Los Alamos with a $449 Lenovo laptop in 2014, explains Moore’s Law through the Intel 4004 and Xeon Ivy Bridge, cites Hal Varian on demand-side chip slowdown, notes ICT spending at 7 percent of GDP, and follows ENIAC, American Airlines’ Reservisor and SABRE, UNIVAC 1 in insurance, IBM 1401 bank systems, credit cards, ATMs, barcode scanners, memory typewriters, Xerox copiers, personal computers, T-1 lines, e-mail, Netscape in 1994, Google, Amazon, Borders, Blockbuster, hacking, identity theft, cyberbullying, school ICT spending, multitasking, and texting while driving. Source anchors: Cray-1, Lenovo laptop, Moore's Law, SABRE, IBM 1401, Netscape, Amazon.

Analysis: The chapter explains how a technology can be miraculous and still not recreate the special century. Cray-1, Lenovo laptop, Moore’s Law, SABRE, IBM 1401, Netscape, and Amazon show vast Technological Change in computation, reservations, banking, search, and retail. The 7 percent GDP share, school ICT disappointments, and Moore’s Law slowdown keep Gordon’s claim disciplined: ICT transformed offices and information work, but did not reach the full span of household, health, transport, and physical labor affected by IR #2.

14. Antibiotics, CT Scans, and the Evolution of Health and Medicine

Summary: Gordon divides health progress after 1940 into antibiotics and vaccines, chronic-disease treatment, medical imaging, insurance, and later incremental gains. He names penicillin, other antibiotics, sulfa drugs, Salk and Sabin polio vaccines, cardiovascular mortality peaking in the early 1960s, smoking awareness, blood-pressure treatment, coronary care, bypass surgery, radiation, chemotherapy, CT scans, MRI, hip and knee replacements, Medicare and Medicaid in 1965, health-insurance expansion, and rising medical spending. He contrasts these with the earlier public-health victories that made life expectancy improve much faster in the first half of the twentieth century than in the second. Source anchors: penicillin, Salk vaccine, Sabin vaccine, cardiovascular peak, CT scans, Medicare, Medicaid.

Analysis: The chapter lets Gordon distinguish medical breakthroughs from the earlier conquest of dirty water, unsafe milk, and infant mortality. Penicillin, Salk vaccine, Sabin vaccine, cardiovascular treatment, CT scans, Medicare, and Medicaid were major improvements, but many arrived before or around 1970. That timing supports Gordon’s claim that later medicine lengthened and improved life through refinements rather than producing another public-health revolution of the same scale.

15. Work, Youth, and Retirement at Home and on the Job

Summary: Gordon follows post-1940 work through safer jobs, appliances, women’s employment, education, pensions, and old age. He notes that the forty-hour week had largely arrived by 1940, that household appliances removed much laundry and fuel-hauling work by 1970, that female labor-force participation rose after the mid-1960s as the baby boom ended, that women became half of college completers by the late 1970s and 58 percent by 2013, that educational attainment rose from 10.9 years for the 1925 cohort to 13.2 for the 1950 cohort and only 13.9 for the 1975 cohort, that Social Security reduced elderly poverty from 35 percent in 1959 to 10 percent by 2003, that ERISA in 1974 created pension protections, that Sun City opened in 1960, and that 10,000 baby boomers retire each day. Source anchors: forty-hour week, baby boom, 58 percent college, 13.9 years, Social Security, ERISA, Sun City.

Analysis: The chapter connects labor improvement to demography and institutions. The forty-hour week and appliances show why many work-condition gains were already mature by 1970, while the baby boom and 58 percent college figure explain the later importance of women’s education and market work. Social Security, ERISA, Sun City, and daily baby-boomer retirement turn retirement into both an achievement of the postwar order and a future fiscal pressure.

Entr'acte: Toward an Understanding of Slower Growth

Summary: The second entr’acte explains why output per person can grow differently from productivity and prepares the book’s final explanatory section. Gordon states that output per person equals output per hour plus hours per person, then explains that women’s entry into market work from roughly 1965 to 1995 raised hours per person even as productivity slowed. He contrasts rapid post-1970 progress in entertainment, communication, cable, satellite TV, VCRs, DVRs, the AT&T breakup, BlackBerry, iPhone, web browsers, search engines, and e-commerce with weaker change in food, clothing, housing, automobiles, air travel, medicine, work, and education. He also argues that GDP understatement was larger for electric light, running water, horse replacement, telegraphy, infant mortality decline, and indoor toilets than for smartphones and computer price improvements. Source anchors: output per person, hours per person, AT&T breakup, iPhone, hedonic prices, indoor toilets, infant mortality.

Analysis: The entr’acte supplies the accounting needed for Gordon’s last claims. Output per person, hours per person, and women’s market work explain why median living standards depend on labor supply as well as output per hour. AT&T breakup, iPhone, and web browsers show real modern change, but indoor toilets, infant mortality, and running water remind the reader that earlier unmeasured gains were broader and more bodily.

16. The Great Leap Forward from the 1920s to the 1950s: What Set of Miracles Created It?

Summary: Gordon explains the midcentury productivity leap through total factor productivity, the Great Depression, World War II, and the delayed payoff of IR #2. He argues that TFP growth accelerated from the 1920s into the 1930s, peaked in the 1940s, then stepped down through the 1950s and 1960s; real GDP more than doubled between 1929 and 1950 while labor and private capital rose much less. The chapter’s mechanisms include electric motors, assembly lines, corporate reorganization, depression pressure, government-financed wartime plants, Willow Run, aircraft and tank production, synthetic rubber, radar, operations research, women in war industries, and postwar use of expanded capacity by Ford, General Motors, and other firms. Source anchors: TFP, 1929-1950, electric motors, assembly lines, Willow Run, synthetic rubber, radar.

Analysis: The chapter gives Gordon’s answer to why the productivity peak occurred when it did. TFP, 1929-1950, electric motors, and assembly lines show earlier inventions being folded into efficient production systems. Willow Run, synthetic rubber, radar, and wartime government finance make this a wartime Industrial Policy mechanism: federal procurement and emergency plants accelerated learning, capacity, and technical transfer in ways normal private investment might have spread over a longer period.

17. Innovation: Can the Future Match the Great Inventions of the Past?

Summary: Gordon tests future-facing techno-optimism against productivity evidence and finds a temporary digital revival rather than a new special century. He compares TFP growth of 1.89 percent per year in 1920-1970 with 0.64 percent in 1970-2014, identifies 1994-2004 as the internet revival at 1.03 percent, and notes 2004-2014 growth near 0.40 percent. He examines web browsers, search engines, e-commerce, paperless offices, searchable parts lists, NYSE transaction counts, new-business formation, manufacturing capacity, net investment, computer price-performance, chip density, artificial intelligence in Macy’s retailing, loan approvals, Vanguard and Schwab robo-advisers, legal discovery software, smartphones in 2007, iPads in 2010, driverless cars, Google’s hand-curated maps, and driverless trucks whose unloading and shelf placement still require people. Source anchors: 1.89 percent TFP, 1994-2004, web browsers, NYSE transactions, robo-advisers, driverless cars, hand-curated maps.

Analysis: The chapter’s force comes from matching named technologies to measured timing. The 1.89 percent TFP baseline, 1994-2004 revival, and web browsers show that digital tools mattered when offices, catalogs, inventories, and retail shifted from paper to networked data. NYSE transactions, robo-advisers, driverless cars, and hand-curated maps then show why Gordon expects smaller future effects: many substitutions are partial, many happened already, and many services still require people moving objects, judging situations, or dealing face to face.

18. Inequality and the Other Headwinds: Long-Run American Economic Growth Slows to a Crawl

Summary: Gordon closes by moving from average productivity to median disposable income. He uses Piketty-Saez tax records from 1917, Census mean and median household income, CBO after-tax and transfer income, the bottom 90 percent, the top 10 percent, the top 1 percent, the Great Compression, unionization falling from 27 percent in 1973 to 13 percent in 2011, minimum-wage erosion, automation, imports, immigration, the GI Bill, student debt above $1 trillion, weak international test performance, age-five vocabulary gaps, baby-boom retirement from 2008 to 2034, labor-force participation falling from 66.0 percent in 2007 to 62.6 percent in June 2015, Social Security trust-fund exhaustion projected for 2034, Medicare for 2030, Detroit and Chicago pension risks, Charles Murray’s “Fishtown,” incarceration among high-school dropouts, globalization, fracking, global warming, and a forecast of barely positive future median disposable income growth. Source anchors: Piketty-Saez, Great Compression, 27 percent unions, $1 trillion debt, baby-boom retirement, Social Security 2034, Fishtown.

Analysis: The final chapter shows why Gordon’s growth pessimism is not only about inventions. Piketty-Saez, Great Compression, 27 percent unions, student debt, baby-boom retirement, Social Security 2034, and Fishtown identify separate channels through which productivity can fail to become broad prosperity. The mechanism makes Commercial Society distributive: slower innovation restrains output per hour, demography restrains hours per person, inequality restrains median gains relative to average gains, and fiscal pressure restrains disposable income relative to pre-tax income.