On Regularity and Normalization in Sequential Screening

Abstract

We comment on the regularity assumptions in the multi-agent sequential screening model of Eso and Szentes (2007). First, we observe that the regularity assumptions are not invariant to relabeling each agent's signal realizations. Second, we show that the regularity assumptions rule out valuation distributions with common bounded support. Third, we show that if each signal realization is labeled to equal the expected valuation, then the regularity assumptions imply that each agent's valuation is equal to his signal realization plus independent mean-zero noise.