The Rise of the Machines How Computers Have Changed Work
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UBS Center The Rise of the Public Paper #4 Machines How Computers Have Changed Work David Dorn No. 4, December 2015 UBS Center Public Paper The Rise of the Machines: How Computers Have Changed Work Contents 3 About the Author Abstract 4 Introduction 5 Is Technological Development Just Beginning or About to End? 8 Drawing on Past Experience: A Short History of Technological Change in Textile Production 12 The Computer Revolution: Renewed Fears about the Automation of Work 14 Computers in Economic Theory: Skill-Biased vs Task-Biased Technological Change 17 Labor Market Polarization 21 Technology versus Globalization 24 How Can Workers Succeed in a Computerized Labor Market? 26 Will the Lessons of the Past Remain Relevant in the Future? 28 Conclusions 29 References 31 Edition About Us 2 About the Author Abstract The so-called “Rise of the Machines” has Prof. David Dorn fundamentally transformed the organiza- tion of work during the last four decades. While enthusiasts are captivated by the new technologies, many worry that these machines will eventually lead to mass unemployment, as robots and computers substitute for human labor. This Public Paper shows that these con- cerns are likely to be exaggerated. Despite rapid technological progress and automa- – Professor at the Department of Economics, tion, unemployment has not dramatically University of Zurich expanded over time. Instead, employment – Affiliated Professor at the UBS Center shifted from the most highly automated sectors to other sectors that experienced Contact [email protected] less technological progress, as well as emerging sectors that were created by new technology. David Dorn is Professor of International Trade and Labor Markets at the University of Zurich and Affil- While computers have little impact on iated Professor at the UBS Center. He was previously overall employment, however, they con- a tenured Associate Professor at the Center for Mon- tribute to rising inequality. Machines etary and Financial Studies (CEMFI) in Madrid, a have overtaken humans in their capability Visiting Professor at Harvard University, and a Visit- to execute well-defined routine tasks pre- ing Scholar at Boston University, MIT, and the Uni- cisely, and many of the production and versity of Chicago. clerical jobs that specialize in these tasks have been irreversibly lost. As a result, the His research connects the fields of labor economics, employment structure of labor markets in international trade, economic geography, and mac- developed countries has become increas- roeconomics. In particular, he studies how globali- ingly polarized as employment concen- zation and technology affect labor markets. trates in a set of highly paid and a set of lowly paid occupations, both of which are Professor Dorn is a Research Fellow of the Centre for difficult to automate. Economic Policy Research (CEPR) in London, the Institute for the Study of Labor (IZA) in Bonn, and As computerization changes the composi- the Center for Economic Studies/ifo Institute (CESifo) tion of human labor rather than decreas- in Munich. He is on the Editorial Board of The Re- ing its overall amount, policymakers view of Economic Studies, and an Associate Editor of should not be primarily concerned about the Journal of the European Economic Association. mass unemployment. Instead, the more immanent policy challenges caused by His research on the labor market impacts of techno- computerization result from changing logy was funded in part by the Swiss National Science skill demands in the labor market and ris- Foundation (SNSF) and the Spanish Ministry of ing economic inequality among workers. Science and Innovation. 3 UBS Center Public Paper The Rise of the Machines: How Computers Have Changed Work Introduction The first fifteen years of the 21st century This essay discusses the impact of tech- have been a difficult period for workers nology on the labor markets in devel- in developed economies. In many oped countries. It argues that an wealthy European, North American, and imminent large decline in the demand for East Asian countries, the share of popu- human labor is far from certain, and that lation holding a job has declined, and speculation about the long-term evolu- wage growth for the average worker has tion of employment is inherently diffi- slowed or even turned negative. The cult. However, there are already “Great Recession” of the years 2007– hundreds of years of experience regard- 2009 is to blame for an important part ing the technological change of the past, of this decline in workers’ fortunes. and researchers have been able to study However, the employment rate in the the impact of computer technology on United States had already been falling for the labor market for several decades. I several years prior to this crisis, and argue that the evidence from the distant labor markets in many countries and recent past reveals recurring pat- remained depressed for a remarkably terns, which may usefully guide expecta- long time after the recession had offi- tions about technology’s impact on labor cially ended.1 New evidence also suggests markets in the near future. that the fraction of national income obtained by workers has been declining for at least three decades in developed countries.2 It is therefore natural to hypothesize that labor markets are not just in a temporary slump, but instead face a fundamental force that increasingly deteriorates work- ers’ outlook for finding a job. Computer technology is an obvious candidate for that role. Whether one enters an office building or a factory, the widespread use of personal computers, communication devices, computer-guided machines, and robots is a striking feature of the work- place of the 21st century. Computer technology often replaces work tasks that humans previously executed, and one thus wonders whether continued technological development will eventu- ally lead to the obsolescence of most human labor. 4 Is Technological Development Just Beginning or About to End? Gordon E. Moore, co-founder of Fairchild computing operations has been falling Semiconductor and Intel Corporation, spectacularly since the 1950s (Figure 1).3 predicted in 1975 that technological prog- ress in the semiconductor industry would Computers are not only becoming cheaper allow a doubling in the number of elec- and more powerful, but also more versa- tronic components per microchip every tile. New applications in areas such as two years, thus leading to rapid progress machine learning, artificial intelligence, in computer processing power. This pre- and mobile robotics hold great promise diction, which became known as for expanding the use of computer tech- “Moore’s Law,” has held up remarkably nology to an ever-wider set of tasks. One well since then. The dramatic progress in of the most publicized innovations in semiconductor technology led to great recent years is the self-driving car, which performance improvements in many elec- may profoundly reshape ground transpor- tronic devices, and to rapidly declining tation in the 21st century. prices of computing equipment. Data compiled by the economist William Nord- Erik Brynjolfsson and Andrew McAfee, haus indicates that the cost per million two scholars at the MIT Sloan Business Fig. 1 Evolution of cost per computing operation (1850–2010) In $ 1,000,000 10,000 100 1 0.01 0.0001 0.000001 0.00000001 1850 1870 1890 1910 1930 1950 1970 1990 2010 Manual Mechanical Vacuum Transistor Microprocessor Note: The costs represent $ per million standardized computing operations per second (MSOPS). Source: Nordhaus (2001) 5 UBS Center Public Paper The Rise of the Machines: How Computers Have Changed Work School, argue that the rapid fall in com- electricity and the development of a pan- puter prices and the wider applicability oply of electrical devices; the invention of of computer technology are heralding a the internal combustion engine which “Second Machine Age” that will trans- revolutionized transportation; a great form the economies of developed coun- improvement in sanitary and living con- tries to an even greater degree than the ditions due to running water, indoor Industrial Revolution.4 As ever-cheaper plumbing, and central heating; the ability robots are able to execute an ever-greater to rearrange molecules which permitted range of tasks, firms will only hold on to great progress in the development of workers as long as a machine cannot exe- pharmaceuticals, plastics, and other cute their jobs more cheaply. The result is chemical products; and the introduction enormous downward pressure on work- of major communication and entertain- ers’ wages, and as these wages fall below ment technology, following the invention a reservation level—the minimum level of of the telephone, the phonograph, pho- wages that makes it worthwhile for peo- tography, radio, and motion pictures ple to hold a job—a rapidly growing pool within a span of just fifteen years. of unemployed individuals will form. Annual growth of U.S. GDP per capita A technology-driven disappearance of accelerated during the Great Innovation most employment opportunities will pro- period, and peaked at a 2.5% average foundly change society, and will require a gain per year between 1950 and the onset new organization of many public institu- of the oil crisis in 1973. In the four tions. Despite the chilling outlook of mass decades since, average annual GDP unemployment, the Second Machine Age growth has been one-third lower at 1.6% will not only produce losers, however. per year. While annual growth even The widespread use of cheap robots in exceeded 4% in the ten years during the production will lower production costs, 1950–1973 period, such a high growth and the resulting productivity increase rate has never again been attained during raises aggregate societal wealth. However, the last thirty years. This slowdown in these gains are likely to be concentrated economic growth is not unique to the among a small group of owners of com- United States, but it is even more pro- puter capital, while a much larger fraction nounced in Japan and in the major Euro- of the society will suffer from the loss of pean economies.