Strategic or Confused Firms? Evidence from "Missing" Transactions in Uganda

Are firms sophisticated maximizers, or do they appear to make mistakes? Using transaction data from Ugandan value-added tax returns, we show that sellers and buyers report different amounts 79% of the time, despite invoices being easily cross-checked. Our estimates suggest that most firms are "advantageous misreporters," but that 25% are "disadvantageous misreporters" who systematically overreport own sales minus purchases such that their tax liability increases. Similarly, many firms-especially disadvantageous misreporters-fail to VAT-report imported inputs they themselves reported at Customs, increasing their liability. On net, unilateral VAT misreporting cost Uganda about US$384 million in foregone 2013-2016 tax revenue.