This dissertation is made of four distinct chapters. In the first chapter, I consider an exogenous restriction on the ability of French trucking firms to extend payment terms to their clients. I find that they provide trade credit at the cost of lower investment, lower return on assets, and higher default risk. In the second chapter, I show that private equity funds with a longer horizon select younger companies at an earlier stage of their development. Companies which receive funding from funds with a longer horizon increase their patent stock significantly more than companies which receive funding from investors with a shorter horizon. The third chapter presents a joint work with Ron Kaniel and David Sraer. We use detailed brokerage accou...