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Estimating the elasticity of intertemporal substitution using mortgage notches

Author

Listed:
  • Best, Michael Carlos
  • Cloyne, James
  • Ilzetzki, Ethan
  • Kleven, Henrik Jacobsen

Abstract

Using a novel source of quasi-experimental variation in interest rates, we develop a new approach to estimating the Elasticity of Intertemporal Substitution (EIS). In the U.K., the mortgage interest rate features discrete jumps - notches - at thresholds for the loan-to-value (LTV) ratio. These notches generate large bunching below the critical LTV thresholds and missing mass above them. We develop a dynamic model that links these empirical moments to the underlying structural EIS. The average EIS is small, around 0.1, and quite homogeneous in the population. This finding is robust to structural assumptions and can allow for uncertainty, a wide range of risk preferences, portfolio reallocation, liquidity constraints, present bias, and optimization frictions. Our findings have implications for the numerous calibration studies that rely on larger values of the EIS.

Suggested Citation

  • Best, Michael Carlos & Cloyne, James & Ilzetzki, Ethan & Kleven, Henrik Jacobsen, 2020. "Estimating the elasticity of intertemporal substitution using mortgage notches," LSE Research Online Documents on Economics 88185, London School of Economics and Political Science, LSE Library.
    • Handle: RePEc:ehl:lserod:88185
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    JEL classification:

    • D14 - Microeconomics - - Household Behavior - - - Household Saving; Personal Finance
    • E40 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - General
    • E43 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Interest Rates: Determination, Term Structure, and Effects
    • D10 - Microeconomics - - Household Behavior - - - General
    • H31 - Public Economics - - Fiscal Policies and Behavior of Economic Agents - - - Household
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E20 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - General (includes Measurement and Data)
    • H30 - Public Economics - - Fiscal Policies and Behavior of Economic Agents - - - General

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