This paper is an empirical investigation into the extent to which transactions costs and taxes influence individual investors' portfolios. Using actual portfolio and demoraphic data made available by the Individual Investor Research Project at Purdue University, this study finds evidence of a significant dividend clientele effect. Reasonable proxy variables used to measure time preferences and tax rates in part explain the cross sectional variability of investors' portfolio dividend yields. The variables that are most important in influencing the individual's dividend decision are age, and a measure of the investor's differential tax rate on dividends and capital gains.

This paper examines the validity of two widely used methods for forming conditional predicted portfolio returns. The first method relies on a one-period, mean-variance theory of equilibrium expected return, sometimes referred to as the “capital asset pricing model” (CAPM). The second method is based upon a proposal by Markowitz [14] and is called the [market model] (MM).

R. Richardson Pettit, Randolph Westerfield, A Model of Capital Asset Risk, The Journal of Financial and Quantitative Analysis, Vol. 7, No. 2, Supplement: Outlook for the Securities Industry (Mar., 1972), pp. 1649-1668