Does "grease money" speed up the wheels of commerce?

Description:

Is it true that fighting corruption can improve economic efficiency and that fighting bribery can be productive? Not according to this study.

subjects: Bribery,  Bureaucracy,  Capital costs,  Commerce,  Corrupt practices,  Econometric models,  Economic aspects,  Economic aspects of Bribery,  Economic aspects of Political corruption,  International trade,  Moral and ethical aspects,  Moral and ethical aspects of Commerce,  Political corruption