Casper Nordal Jørgensen forsvarer sin ph.d.-afhandling ved Økonomisk Institut – Københavns Universitet

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Casper Nordal Jørgensen forsvarer sin ph.d.-afhandling ved Økonomisk Institut

Casper Nordal Jørgensen  

"Understanding the Consumption and Savings Decisions of Households". Det vil være muligt før forsvaret at rekvirere en kopi af afhandlingen ved henvendelse til Informationen (26.0.20), Økonomisk Institut.


  • Professor Mette Ejrnæs, Økonomisk Institut, Københavns Universitet
  • Professor Martin Browning, Department of Economics, University of Oxford, UK
  • Professor Bent Jesper Christensen, Institut for Økonomi, Aarhus School of Business and Social Sciencess, Aarhus Universitet

Tid og sted
Mandag den 29. maj 2017 kl. 14.00. Københavns Universitet, Center for Sundhed og Samfund, Øster Farimagsgade 5, 1353 København K, bygning 26, Det Store Seminarrum (lokale 26.2.21), 2. sal. Af hensyn til kandidaten lukkes dørene præcis. 

The dissertation analyse three different aspects of how households choose to spend and save their money.   The first chapter discusses the so-called credit card debt puzzle, the observation that households repeated hold expensive credit card debt and low interest bearing assets. We show that this behaviour can be perfectly rational when households face the risk of losing access to future credit card borrowing. The key is that current borrowing acts as an insurance against future income loss. We show that households place a considerable premium on this option.   The second chapter addresses an alternative approach to estimating marginal propensities to consume (MPC). We show that estimating consumption functions using regression splines and then calculating MPCs yields surprisingly accurate estimates. The proposed method is beneficial because of its simplicity and because it does not require e.g. natural experiments to infer households propensities to consume. Using the method we find the Danish aggregate MPC to be about 47%.   The third and final chapter addresses and quantifies a new channel --quality channel-- for consumption smoothing. When facing higher unemployment rates middle and high income households reduce shopping expenditures by buying both fewer and cheaper products. Low income households, however do not reduce their expenditures. Our evidence suggests that the low income households are shopping constrained, because they are already buying the lowest priced products. This suggests that we might severely underestimate the welfare costs of business cycles using traditional economic models.