This paper empirically addresses the question of which are the benefits for a firm to borrow from multiple banks, by explicitly correcting the potential endogeneity of the firm's decision of whether to rely on (and on how may) multiple relationships through a two-stage conditional maximum likelihood (2SCML) estimation technique. The estimation procedure also allows an in-depth analysis of the determinants of the multiple banking choice. The results are consistent with the hypothesis that the likelihood of credit tightening is lower for firms having more lending relationships, and located in less concentrated credit markets. Banking power at firm level and at market level is detrimental to the firm, as it increases the probability of credit constraints. However, firms that engage in multiple relationships benefit from competition among lending banks in terms of a lower probability of tightening, though such competition does not fully outweigh the marginal effect of local banking market power. As for the multiple banking choice, larger, riskier, less profitable and more opaque firms prefer more lending ties, and the number of relationships is also positively related with credit market concentration. I interpret the findings as providing evidence that a key reason why firms rely on multiple banking is their desire to reduce the hold-up costs and the risk of being credit constrained.
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