We analyze the optimal financing of investment projects when managers must exert unobservable effort and can also switch to less profitable riskier ventures. Optimal financial contracts can be implemented by a combination of debt and equity when the risk‐shifting problem is the most severe while stock options are also needed when the effort problem is the most severe. Worsening of the moral hazard problems leads to decreases in investment and output at the macroeconomic level. Moreover, aggregate leverage decreases with the risk‐shifting problem and increases with the effort problem.

We consider a theoretical model that offers a rationale for the syndication of venture capital investments: syndication improves the screening process of venture capitalists and prevents competition between investors after investment opportunities are disclosed. The analysis identifies the costs of syndication in terms of investment decisions or post-investment involvement of venture capitalists. These costs depend crucially on the level of experience of venture capitalists. The model generates empirical predictions concerning the determinants of syndication and the characteristics of syndicated deals.