Karim Nchare

I am a Ph.D. Candidate in Economics at The Pennsylvania State University. I will be available for interviews at the ASSA 2019 meeting in Atlanta. Please find a copy of my current CV here

Fields of Interest

Econometric Theory, Microeconometrics, Industrial Organization, Consumer Behavior

Working Papers

"Partial Identification of Preferences and Counterfactuals in discrete choice models with inattention" (Job Market paper) [Draft coming soon]

Abstract: Do people over time, buy the same insurance plans, subscribe to the same utility services because they prefer those options or because they don’t even pay attention to alternatives available? I propose an econometric framework that separately identified inattention from other sources of consumer inertia such as switching costs. My identification strategy relies on an exclusion restriction that some variables affect attention and not utility. Based on this model, I derive testable implications and suggest estimation and inference methods for parameters of interest. Finally, I demonstrated how the identified parameters can be used for policy and welfare analysis by bounding money-metric welfare measures of attentive consumers.

"Food Expenditure Response to Increase in the Supplemental Nutrition Assistance Program Benefits: A Distributional Approach" (with Ryo Makioka) [Draft]

Abstract: This paper studies the impact of the increases in SNAP benefits on food expenditure of program participants. Existing literature on the topic has focused on the average treatment effect without considering heterogeneity in the effect of SNAP benefit enhancements and changes in the participant population. To address these issues, we propose a distributional approach based on a nonparametric quantile difference-in-differences setting that accounts for changes in the participant population. Using exogenous increase in SNAP benefits due to the American Recovery and Reinvestment Act of 2009, we find that while participants at the 20th percentile of the distribution of the food expenditure share experienced a 0.57 percent increase in food expenditure share, those at the 70th percentile had their food expenditure share increase by 5.41 percent.

Research in Progress

"Testable Implications of Normality in Stochastic Demand for Two Goods"

Abstract: This paper investigates the empirical content of the joint hypotheses of rationality and normality of demand for two goods when data consists of repeated cross-sections. Assuming completely unrestricted unobserved heterogeneity and allowing for endogeneity of total expenditures, I derive necessary and sufficient conditions for observed data to be consistent with this joint assumption. These conditions are used to provide bounds on counterfactual distributions of demand and parameters associated. An empirical application using data drawn from the U.S. Consumer Expenditure Survey (CEX) illustrates the relevance of my results.

"Nonparametric Analysis of Status Quo Bias"

Abstract: I investigate necessary and sufficient nonparametric conditions for Status Quo Bias.

Teaching Experience

Instructor:

  • ECON 102: Introductory Microeconomic Analysis and Policy, Penn State, Undergraduate (Summer 2018)
  • ECON 306: Introduction to Econometrics, Penn State, Undergraduate (Summer 2016)

Teaching Assistant:

  • ECON 104: Introductory Macroeconomic Analysis and Policy, Penn State, Undergraduate (Fall 2018)
  • ECON 425: Economics of Public Expenditures, Penn State, Undergraduate (Fall 2015, 2016 & Spring 2016, 2017, 2018)
  • ECON 102: Introductory Microeconomic Analysis and Policy, Penn State, Undergraduate (Fall 2017)
  • ECON 471: Growth and Development, Penn State, Undergraduate (Spring 2015, Spring 2017)
  • ECN 7065A: Elements of Econometrics Theory, University of Montreal, Graduate (Winter 2014)
  • ECON 302: Intermediate Microeconomic Analysis, Penn State, Undergraduate (Fall 2014)
  • ECN 2160: Econometrics 2, University of Montreal, Undergraduate (Fall 2013 & Winter 2014)
  • ECN 6350A: Elements of Econometrics, University of Montreal, Graduate (Fall 2013)

Contact Information:

Email: axn243@psu.edu

Office: 303 Kern Building, The Pennsylvania State University, University Park, PA 16802