[This paper characterizes when joint financing of two projects through debt increases expected default costs, contrary to conventional wisdom. Separate financing dominates joint financing when risk-contamination losses—that are associated with the contagious default of a well-performing project that is dragged down by the other project's poor performance—outweigh standard coinsurance gains. Separate financing becomes more attractive than joint financing when the fraction of returns lost under default increases and when projects have lower mean returns, higher variability, more positive correlation, and more negative skewness. These predictions are broadly consistent with evidence on conglomerate mergers, spinoffs, project finance, and securitization.]

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This paper characterizes when joint financing of two projects through debt increases expected default costs, contrary to conventional wisdom. Separate financing dominates joint financing when risk-contamination losses—that are associated with the contagious default of a well-performing project that is dragged down by the other project's poor performance—outweigh standard coinsurance gains. Separate financing becomes more attractive than joint financing when the fraction of returns lost under default increases and when projects have lower mean returns, higher variability, more positive correlation, and more negative skewness. These predictions are broadly consistent with evidence on conglomerate mergers, spinoffs, project finance, and securitization.

We create a novel, comprehensive dataset of UK-based startups with extensive information on ownership, control, and valuation. Our database provides unique descriptive evidence about the relevance of individual stakeholders in startups, particularly before the entry of venture capital institutional investors. We compare the influence of two comparable characteristics of various groups of pre-institutional individual stakeholders: size and experience. We show that the quantity as well as the experience, of founders, directors, and other individual investors correlate with the startup’s type of, and value at, exit. Success results are very different across types of diversity: functional diversity appears to have a positive relationship with success whereas that of demographic diversity is negative.