In this paper, we survey the cost differentials by debt issue purpose and the method of underwriting. We find that cost differentials are a function of the purpose for which the debt was issued, with bond purposes traditionally considered riskier facing higher borrowing costs. However, this effect is not uniform and varies by credit quality portfolios. Moreover, the method of bond sale is an important factor for true interest costs. Overall, the competitive method of sale consistently performs better than the negotiated method of sale in all regression models, even after correcting for self-selection.
Guzman and Moldogaziev/Cost Differentials by Debt Issue Purpose and Method of Sale 79sale method matter? Other debt issuance decisions may also be of high importance-debt instrument structure choices, special options, credit enhancements, and payment structures and sources-all will have direct implications for municipal borrowing costs. Previous empirical studies suggest that credit ratings (both enhanced and underlying), call and put provisions, underwriter's method of sale, and a maturity structure of bond series are significant factors in a broad array of determinants that have been found to have a significant effect on municipal borrowing costs (Denison, Yan, and Robbins and Simonsen 2007). Researchers have also found that revenue bond issuers, compared to general obligation (GO) bonds, pay higher interest on their debt (Hopwell and Kaufman 1977;Peng and Brucato 2004;Yusuf and Liu 2008). However, with a few exceptions, these studies tend to focus on a single industry or aggregate the issue purpose types to low-risk and high-risk categories (Peng and Brucato 2004). Consequently, studies that address diverse industries and cost differentials associated with such diversity are rare. We attempt to fill this gap by presenting empirical evidence on cost differentials by debt issue industry in California and by discussing management decision choices on how to keep municipal debt issue costs as low as possible. We distinguish between debt industries issued for the purposes of higher and secondary education, development, public facilities, housing, utilities, environmental facilities, health care, transportation, and other miscellaneous purposes. In addition to issue purpose, we pay attention to the sources of debt repayment to account for the differences in interest costs based on perceived default probabilities by market participants. We use controls for market-related and issue/issuer specific characteristics. 1 We begin our paper by discussing the background rationale and the relevant literature from the field of state and local government debt finance. We then describe characteristics of the data that we use in this empirical research and carefully examine outcome and explanatory variables. In the discussion of variables, embedded are the findings from current municipal finance literature that provide theoretical and empirical justifications for the variables in the regression models. After the discussion of vari...