Is there any academic paper documented about firms' trade credit collection approach?
My hit from Google Scholar (had to go to the bottom of page 1 for this one!) is
Macro-Economic Growth,Enterprise Competitive Status and Trade Credit Policy
Abstract:

This paper investigates the effect of macro- economic growth and enterprise competitive status on trade credit policy from suppliers with trade credit's perspective,and the moderate effect of industry characteristics. The study indicates that: The higher the competitive status,the shorter the trade credit collection period to downstream enterprises,while this relation is not obvious among enterprises in less concentrated industry; When macro- economic grows fast,regardless howconcentrated industries that enterprises are located in,enterprises with higher competitive status are more prone to reduce the account receivable collective period; With further considering industry characteristic,the effect of macro- economic growth and competitive status of enterprises on trade credit policy shows significant difference in the quadrant formed by different industry prosperity and concentration.