This paper applies the mean-variance portfolio optimization (PO) approach and the stochastic dominance (SD) test to examine preferences for international diversification versus domestic diversification from American investors’ viewpoints. Our PO results imply that the domestic diversification strategy dominates the international diversification strategy at a lower risk level and the reverse is ...

the main purpose of this study was to investigate the impact of portfolios and conferencing techniques on iranian efl learners' writing skill. the experiment involved iranian intermediate students that were randomly assigned to two experimental groups and one control group. the participants of the first experimental group were asked to provide portfolios of their 4 paragraphs during the course ...

The value that brokers generate depends on both the quality of their investment recommendations and their clients’ counterfactual portfolios. To identify counterfactual portfolios inside a defined contribution retirement plan, we exploit time-series variation in access to brokers. When brokers are available, the correlations with age, income, and educational attainment suggest that brokers are ...

We present a jump-diffusion international asset pricing model with stochastic exchange rates and inflation rates when investors consume both traded and nontraded goods. We argue that in general, the Adler-Duma inflation rate differential may not capture PPP deviation risks, unless all volatilities, drift rates and jumps rates for price levels, exchange rates and asset returns are constant, and ...

Robust portfolios resolve the sensitivity issue identified as a concern in implementing mean-variance analysis. Because robust approaches are not widely used in practice due to a limited understanding regarding the portfolios constructed from these methods, we present an analysis of the composition of robust equity portfolios. We find that compared to the Markowitz mean-variance formulation, ro...

In a financial market, the appreciation rates of stocks are statistically difficult to estimate, and typically only some confidence intervals in which the rates reside can be estimated. In this paper we study continuous-time portfolio selection under ambiguity, in the sense that the appreciation rates are only known to be in a certain convex closed set and the portfolios are allowed to be based...