J. Quant. Econ. DOI 10.1007/s40953-016-0056-1 ORIGINAL ARTICLE Sunk Costs, Firm Heterogeneity, Export Market Entry and Exit: Evidence from India M. Padmaja 1 · Subash Sasidharan 1 © The Indian Econometric Society 2016 Abstract This paper analyses the role of sunk costs and firm heterogeneity in firm decision to enter and exit export markets. Employing rich firm-level data on Indian manufacturing firms, the study points out that sunk costs in terms of previous export experience significantly explain entry and exit decisions of firms in the export market. The first set of analysis involves estimation of dynamic discrete choice model using random effects probit correcting for initial conditions problem. We find evidence that previous export experience (sunk costs) matters for export decision. However, importance of sunk costs is found to depreciate rapidly. Further, analysis across sub- sample of firms accounting for firm heterogeneity factors like size and product level information supports the hypothesis of sunk costs. Second set of analysis involving firm survival in export markets using discrete-time hazard models shows evidence of negative duration dependence. We observe that those firms which continue to export for few years are less likely to exit from export markets. Keywords Sunk costs · Firm heterogeneity · Dynamic random effects model · Proportional hazards JEL Classification F10 · F14 · C41 B M. Padmaja padmaja251988@gmail.com Subash Sasidharan subash@iitm.ac.in 1 Department of Humanities and Social Sciences, Indian Institute of Technology Madras, Chennai, India 123