It can be more challenging to efficiently model the covariance matrices for multivariate longitudinal data than for the univariate case, due to the correlations arising between multiple responses. The positive-definiteness constraint and the high dimensionality are further obstacles in...

In the present article, we propose that consumers’ initial effort investment in pursuing a goal may increase or decrease the value of the goal and the consumer’s subsequent motivation, depending on whether the pursuit of the goal is perceived to be one’s autonomous choice. When consumers...

The problem of stock hedging is reconsidered in this paper, where a put option is chosen from a set of available put options to hedge the market risk of a stock. A formula is proposed to determine the probability that the potential loss exceeds a predetermined level of Value-at-Risk, which is...

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