Leonard Goff

I am a PhD student in economics at Columbia University, and will be joining the University of Georgia next year as an assistant professor in the economics department.

My primary research fields are applied econometrics and labor economics. I also have interests in environmental and public economics.

You can reach me at leonard.goff@columbia.edu.

I have undergraduate degrees in physics and philosophy from the University of Maryland, and hold an MSc in physics and an MA in economics from the University of British Columbia.

Research

Job Market Paper

  • Treatment Effects in Bunching Designs: The Impact of the Federal Overtime Rule on Hours
    • [Supplemental Material]
    • Abstract: The Fair Labor Standards Act (FLSA) mandates overtime premium pay for most U.S. workers, but a lack of variation in the rule has made it difficult to assess its impact on hours worked. I use bunching observed at 40 hours in a new administrative dataset of weekly paychecks to estimate this effect. To do so, I develop a framework in which bunching at a choice-set kink is informative about causal effects in a way that is robust across underlying structural models, generalizing previous approaches. Under a non-parametric shape constraint on the distribution of hours and flexible assumptions on choice, a local average treatment effect among bunchers is partially identified. The bounds are informative in the overtime context and suggest that covered hourly workers in the U.S. work an average of at least half an hour less as a result of the FLSA mandate, in weeks that they do work at least 40 hours. This delivers an estimate of the wage elasticity of hours demand of -0.04.
    • Identifying the buncher LATE

Working Papers

  • A Vector Monotonicity Assumption for Multiple Instruments
    • [Supplemental Material]
    • Abstract: When a researcher wishes to use multiple instrumental variables for a single binary treatment, the familiar LATE monotonicity assumption can become restrictive: it requires that all units share a common direction of response even when different instruments are shifted in opposing directions. What I call vector monotonicity, by contrast, simply restricts treatment status to be monotonic in each instrument separately. This is a natural assumption in many contexts, capturing the intuitive notion of "no defiers" for each instrument. I show that in a setting with a binary treatment and multiple discrete instruments, a class of causal parameters is point identified under vector monotonicity, including the average treatment effect among units that are responsive to any particular subset of the instruments. I propose a simple "2SLS-like" estimator for the family of identified treatment effect parameters. An empirical application revisits the labor market returns to college education.

Work in Progress

  • The Career Impact of First Jobs: Evidence and Labor Market Design Lessons from Randomized Choice Sets
  • Do Firms Fully Exploit Their Labor Market Power in Setting Wages? Evidence from Canada

Publications

Outside of economics:

Curriculum Vitae

Teaching Materials

Senior Honors Thesis Workshop (Fall 2019; Columbia ECON GU4999)

(Professor: Michael Best)

Microeconometrics (Fall 2018; Columbia ECON GR6414)

Code

Visit my Github

Some software projects:

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