Neil B. Murphy, A Reestimation of the Benston-Bell-Murphy Cost Functions for a Larger Sample with Greater Size and Geographic Dispersion, The Journal of Financial and Quantitative Analysis, Vol. 7, No. 5 (Dec., 1972), pp. 2097-2105

Commercial bank portfolio models developed by Hester [6], Porter [11], and Kane and Malkiel [7], among others, relate the structure of an asset portfolio to variation in the level of deposits. Similarly, in a recent application of linear programming to asset management, Cohen and Hammer [3] specify a liquidity constraint based upon deposit fluctuations. However, there have been few empirical studies of the determinants of demand deposit fluctuations. The purpose of this paper is to extend the work of Gramley [4], Rangarajan [12], and Wilkerson [14] on the determinants of deposit variability. In this paper, the analysis will be confined to demand deposit variability.

In a recent article, Donald R. Hodgman set forth a framework for analyzing commercial bank lending behavior which emphasized the relationship of customers to their banks as both depositors and borrowers. Specifically, Hodgman links the borrower's contract rate of interest to the profitability of his deposit account, i.e., banks compete for profitable deposit customers by offering the customer a rate which is lower than the comparable open market rate (adjusted for risk). Hodgman uses the terms deposit relationship and customer relationship to describe this behavior. He argues that compensating balance requirements, the prime rate convention, and provision of services below cost may be viewed as a systematic, rational attempt by commercial banks to maximize long-run profit under existing institutional arrangements when viewed from the perspective of the customer relationship.

Neil B. Murphy, Harry Weintrob, Evaluating Liquidity Under Conditions of Uncertainty in Mutual Savings Banks, The Journal of Financial and Quantitative Analysis, Vol. 4, No. 5 (Jan., 1970), pp. 559-568

Alan S. McCall, Neil B. Murphy, A Note on Evaluating Liquidity Under Conditions of Uncertainty in Mutual Savings Banks, The Journal of Financial and Quantitative Analysis, Vol. 6, No. 4 (Sep., 1971), pp. 1165-1169

Deposit variability in banking has received substantial attention in recent empirical studies [1], [2], [3], [4], [5], and [7], Most of these efforts have been cross-section analyses of the determinants of variability. However, the impact of branching on deposit variability has not been tested in any of these studies. Wacht suggests that branching could reduce deposit variability substantially, especially if geographical dispersion could be achieved through relaxing interstate restrictions on branching [6]. In this paper, Wacht's suggestions will be subject to empirical testing for one thrift institution located in a major eastern metropolitan area. In Section I, the test methodology is presented. Data sources and empirical results are discussed in Section II, while the study is summarized and the implications for future research are discussed in Section III.