Global minimum determination of the Born-Oppenheimer surface within density functional theory

We present a novel method, which we call dual minima hopping method (DMHM), that allows us to find the global minimum of the potential energy surface (PES) within density functional theory for systems where a fast but less accurate calculation of the PES is possible. This method can rapidly find the ground state configuration of clusters and other complex systems with present day computer power by performing a systematic search. We apply the new method to silicon clusters. Even though these systems have already been extensively studied by other methods, we find new configurations that are lower in energy than the previously found.Comment: 4 pages, 3 figures, minor changes, more structures are presented no

Credit and Equity Rationing in Markets with Adverse Selection

Previous theories of financial market rationing focused on a single market, either the credit or the equity market. An interesting question is whether credit and equity rationing are mutually compatible, and how they interact. We consider a model with two-dimensional asymmetric information, where entrepreneurs have private information about both the expected returns and the risk of their projects. We show that credit and equity rationing may occur individually or simultaneously. Moreover, competition between the two markets may generate the adverse selection that leads to rationing outcomes

The First Deal: The Division of Founder Equity in New Ventures

This paper examines the division of founder shares in entrepreneurial ventures, focusing on the decision of whether or not to divide the shares equally among all founders. To motivate the empirical analysis we develop a simple theory of costly bargaining, where founders trade off the simplicity of accepting an equal split, with the costs of negotiating a differentiated allocation of founder equity. We test the predictions of the theory on a proprietary dataset comprised of 1,476 founders in 511 entrepreneurial ventures. The empirical analysis consists of three main steps. First we consider determinants of equal splitting. We identify three founder characteristics –idea generation, prior entrepreneurial experience and founder capital contributions – regarding which greater team heterogeneity reduces the likelihood of equal splitting. Second, we show that these same founder characteristics also significantly affect the share premium in teams that split the equity unequally. Third, we show that equal splitting is associated with lower pre-money valuations in first financing rounds. Further econometric tests suggest that, as predicted by the theory, this effect is driven by unobservable heterogeneity, and it is more pronounced in teams that make quick decisions about founder share allocations. In addition we perform some counterfactual calculations that estimate the amount of money ‘left on the table’ by stronger founders who agree to an equal split. We estimate that the value at stake is approximately 10% of the firm equity, 25% of the average founder stake, or $450K in net present value.

The Circulation of Ideas in Firms and Markets

Novel early stage ideas face uncertainty on the expertise needed to elaborate them, which creates a need to circulate them widely to find a match. Yet as information is not excludable, shared ideas may be stolen, reducing incentives to innovate. Still, in idea-rich environments inventors may share them without contractual protection. Idea density is enhanced by firms ensuring rewards to inventors, while their legal boundaries limit idea leakage. As firms limit idea circulation, the innovative environment involves a symbiotic interaction: firms incubate ideas and allow employees leave if they cannot find an internal fit; markets allow for wide ideas circulation of ideas until matched and completed; under certain circumstances ideas may be even developed in both firms and markets.

Liberalization, Moral Hazard in Banking, and Prudential Regulation: Are Capital Requirements Enough?

In a dynamic model of moral hazard, competition can undermine prudent bank behavior. While capital-requirement regulation can induce prudent behavior, the policy yields Pareto-inefficient outcomes. Capital requirements reduce gambling incentives by putting bank equity at risk. However, they also have a perverse effect of harming banks' franchise values, thus encouraging gambling. Pareto-efficient outcomes can be achieved by adding deposit-rate controls as a regulatory instrument, since they facilitate prudent investment by increasing franchise values. Even if deposit-rate ceilings are not binding on the equilibrium path, they may be useful in deterring gambling off the equilibrium path. (JEL G2, E4, L5

The Importance of Trust for Investment: Evidence from Venture Capital

We examine the effect of trust on financial investment and contracting decisions in a micro-economic environment where trust is exogenous. Using hand-collected data on European venture capital, we show that the Eurobarometer measure of trust among nations significantly affects investment decisions. This holds even after controlling for investor and company fixed effects, geographic distance, information and transaction costs. The national identity of venture capital firms' individual partners further contributes to the effect of trust. Education and work experience reduce the effect of trust but do not eliminate it. We also examine the relationship between trust and sophisticated contracts involving contingent control rights and find that, even after controlling for endogeneity, they are complements, not substitutes.

The Effects of Government-Sponsored Venture Capital: International Evidence

This paper examines the impact of government-sponsored venture capitalists (GVCs) on the success of enterprises. Using international enterprise-level data, we identify a surprising non-monotonicity in the effect of GVC on the likelihood of exit via initial public offerings (IPOs) or third party acquisitions. Enterprises that receive funding from both private venture capitalists (PVCs) and GVCs outperform benchmark enterprises financed purely by private venture capitalists if only a moderate fraction of funding comes from GVCs. However, enterprises underperform if a large fraction of funding comes from GVCs. Instrumental variable regressions suggest that endogeneity in the form of unobservable selection effects cannot account for these effects of GVC financing. The underperformance result appears to be largely driven by investments made in times when private venture capital is abundant. The outperformance result applies only to venture capital firms that are supported but not owned outright by governments.

A survey of venture capital research

This survey reviews the growing body of academic work on venture capital. It lays out the major data sources used. It examines the work on venture capital investments in companies, looking at issues of selection, contracting, post-investment services and exits. The survey considers recent work on organizational structures of venture capital firms, and the relationship between general and limited partners. It discusses the work on the returns to venture capital investments. It also examines public policies, and the role of venture capital in the economy at large.

A Soft Budget Constraint Explanation for the Venture Capital Cycle

We explore why venture capital funds limit the amount of capital they raise and do not reinvest the proceeds. This structure is puzzling because it leads to a succession of several funds financing each new venture which multiplies the well known agency problems. We argue that an inside investor cannot provide a hard budget constraint while a less well informed outsider can. Therefore, the venture capitalist delegates the continuation decision to the outsider by ex ante restricting the amount of capital he has under management. The soft budget constraint problem becomes the more important the higher the entrepreneur’s private benefits are and the higher the probability of failure of a project is