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SUMMARY: Aureo De Paula\, UCL (Econometrics Seminar)
DESCRIPTION: Title: Estimating Nesting Structures (with Ali Hortacsu\, Jona
 s Lieber and Julien Monardo) Abstract: We build on a recent generalization 
 of differentiated product demand models: the Inverse Product Differentiatio
 n Logit (IPDL).  Like the nested logit and its variations\, which the IPDL 
 generalises\, the model relies on a nesting structure for contemplated alte
 rnatives.  We propose a method to […]
X-ALT-DESC;FMTTYPE=text/html: <p>Title: Estimating Nesting Structures (with
  Ali Hortacsu\, Jonas Lieber and Julien Monardo)</p><p>Abstract:<br /><em>W
 e build on a recent generalization of differentiated product demand models:
  the Inverse Product Differentiation Logit (IPDL).  Like the nested logit a
 nd its variations\, which the IPDL generalises\, the model relies on a nest
 ing structure for contemplated alternatives.  We propose a method to estima
 te nest parameters. Because the number of potential nests is exponential in
  the number of groups\, there is a dimensionality issue. Building on insigh
 ts from the estimation of high-dimensional models with non-negativity const
 raints\, we show theoretically and in simulations that non-negativity condi
 tions coming from economic theory are sufficient for regularization.  In pa
 rticular\, the researcher does not have to choose a second stage tuning par
 ameter for the non-negative IV estimator.  Our method can be implemented ef
 ficiently by solving a sequence of convex programs\, which can be highly pa
 rallelized.</em></p>
LOCATION:IONA 533
GEO:49.260872;-123.113952
URL;VALUE=URI:https://economics.ubc.ca/events/event/aureo-de-paula-ucl-econ
 ometrics-seminar/
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