Dr. Martin Bronfenbrenner (1914-1997): Scholar, Critic, Cynic, and Comrade-in-Arms

ABSTRACT Professor Martin Bronfenbrenner's mark on the economics profession was significant and worth remembering. He touched the lives of many as a father, cousin, teacher, scholar, expert referee, colleague, and judge of important contemporary debates. Of special interest is his unique personality. He was a specialist in self-effacement, peppered with liberal shakes of cynicism and sarcasm. Despite all this, he managed to win the respect and hearts of individuals on several continents and across several generations. This essay brings a small but diverse part of the story together in one place.     

INTANGIBLE CAPITAL AND U.S. ECONOMIC GROWTH

Published macroeconomic data traditionally exclude most intangible investment from measured GDP. This situation is beginning to change, but our estimates suggest that as much as $800 billion is still excluded from U.S. published data (as of 2003), and that this leads to the exclusion of more than $3 trillion of business intangible capital stock. To assess the importance of this omission, we add intangible capital to the standard sources-of-growth framework used by the BLS, and find that the inclusion of our list of intangible assets makes a significant difference in the observed patterns of U.S. economic growth. The rate of change of output per worker increases more rapidly when intangibles are counted as capital, and capital deepening becomes the unambiguously dominant source of growth in labor productivity. The role of multifactor productivity is correspondingly diminished, and labor's income share is found to have decreased significantly over the last 50 years.     

Shifting Trends in Semiconductor Prices and the Pace of Technological Progress

Business Economics - This paper examines three questions motivated by previous research on semiconductors and productivity growth: Why did semiconductor prices fall so rapidly in the second half of...     

Prices of high-tech products,mismeasurement, and the pace of innovation

Introduction

Two recent papers have made compelling cases that mismeasurement of prices of high-tech products cannot explain the slow pace of labor productivity growth that has prevailed since the mid-2000s. Does that result indicate that mismeasurement of high-tech products has limited implications for patterns of economic growth? The answer in this paper is “no.”.

Results

We demonstrate that the understatement of price declines for high-tech products in official measures has a dramatic effect on the pattern of multifactor productivity (MFP) growth across sectors. In particular, we show that correcting this mismeasurement implies faster MFP growth in high-tech sectors and slower MFP advance outside the high-tech sector. If MFP growth is taken as a rough proxy for the pace of innovation, our results suggest that innovation in the tech sector has been more rapid than the rate that would be inferred from official statistics (and less rapid outside high-tech).

Conclusion

These results deepen the productivity puzzle. If the pace of innovation in high-tech sectors has been more rapid than indicated by official statistics, then it is perhaps even more puzzling that overall labor productivity growth has been so sluggish in recent years.