David B. Huffman

Economics Department
University of Pittsburgh
230 S. Bouquet St.
Pittsburgh, PA 15260

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NBER Working Papers and Publications

October 2017Global Evidence on Economic Preferences
with Armin Falk, Anke Becker, Thomas Dohmen, Benjamin Enke, Uwe Sunde: w23943
This paper studies the global variation in economic preferences. For this purpose, we present the Global Preference Survey (GPS), an experimentally validated survey dataset of time preference, risk preference, positive and negative reciprocity, altruism, and trust from 80,000 individuals in 76 countries. The data reveal substantial heterogeneity in preferences across countries, but even larger within-country heterogeneity. Across individuals, preferences vary with age, gender, and cognitive ability, yet these relationships appear partly country specific. At the country level, the data reveal correlations between preferences and bio-geographic and cultural variables such as agricultural suitability, language structure, and religion. Variation in preferences is also correlated with economic ...
July 2016Time Discounting and Economic Decision-making Among the Elderly
with Raimond Maurer, Olivia S. Mitchell: w22438
This paper evaluates the extent of heterogeneity in time discounting among elderly Americans, as well as its role in explaining older peoples’ key behaviors. We first show how older Americans evaluate simple (hypothetical) intertemporal choices in which payments now are compared with payments in the future. This adds to the literature on time horizon experiments by focusing on a nationally representative sample of persons age 70+. Using the indicators derived from this experiment, we show how differences in discounting patterns are associated with characteristics of particular importance in elderly populations, such as serious health and mental conditions. We then relate our discounting measure to key outcome variables including wealth, the timing of retirement, investments in health, and ...
March 2011When a Nudge Isn't Enough: Defaults and Saving Among Low-Income Tax Filers
with Erin Todd Bronchetti, Thomas S. Dee, Ellen Magenheim: w16887
Recent evidence suggests that the default options implicit in economic choices (e.g., 401(k) savings by white-collar workers) have extraordinarily large effects on decision-making. This study presents a field experiment that evaluates the effect of defaults on savings among a highly policy-relevant population: low-income tax filers. In the control condition, tax filers could choose (i.e., opt in) to receive some of their federal tax refund in the form of U.S. Savings Bonds. In the treatment condition, a fraction of the tax refund was automatically directed to U.S. Savings Bonds unless tax filers actively chose another allocation. We find that the opt-out default had no impact on savings behavior. Furthermore, our treatment estimate is sufficiently precise to reject effects as small as one-...

Published: “When a Nudge isn’t Enough: Defaults and Saving among Low - Income Tax Filers,” with Erin Bronchetti, David Huffman, and Ellen Magenheim, National Tax Journal 66(3), September 2013, 609 - 634. citation courtesy of

April 2008Institutions and Contract Enforcement
with Armin Falk, W. Bentley MacLeod: w13961
We provide evidence on how two important types of institutions -- dismissal barriers, and bonus pay -- affect contract enforcement behavior in a market with incomplete contracts and repeated interactions. Dismissal barriers are shown to have a strong negative impact on worker performance, and market efficiency, by interfering with firms' use of firing threat as an incentive device. Dismissal barriers also distort the dynamics of worker effort levels over time, cause firms to rely more on the spot market for labor, and create a distribution of relationship lengths in the market that is more extreme, with more very short and more very long relationships. The introduction of a bonus pay option dramatically changes the market outcome. Firms are observed to substitute bonus pay for threat of fi...

Published: Armin Falk & David Huffman & W. Bentley Macleod, 2015. "Institutions and Contract Enforcement," Journal of Labor Economics, University of Chicago Press, vol. 33(3), pages 571 - 590. citation courtesy of

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