While the role of exports in promoting growth in general, and productivity in particular, has been investigated … at the firm level been used to look at the extent and causes of productivity differentials between exporters and their …, exporters are found to be more productive than non-exporters, and the more productive firms self-select into export markets …

Export-sales ratio , labour productivity , continuous treatment , dose-response function … status and the growth of its labour productivity, using the firms' export status as a binary treatment variable and comparing …'s export-sales ratio and its labour productivity growth rate. We find that there is a causal effect of firms' export activities …