The second is that the return variance estimate is usually inaccurate and there are different rival estimates, or scenarios.
This set of instruments Z t consists of a constant, the dividend-price ratio, the lagged equity return, plus a measure for the lagged equity return variance, exchange rate return variance, and their covariance.
The set of instruments Z t consists of a constant, the dividend-price ratio, the lagged equity return, plus a measure for the lagged equity return variance, exchange rate return variance, and their covariance.
Price limits cause stock returns to be restricted within a prespecified range whereas infrequent trading induces spurious autocorrelation and biased estimate of the return variance.
The set of possible instruments Z t contains a constant, the dividend-price ratio, the lagged market return, the lagged exchange rate change, plus a measure for the lagged equity return variance, exchange rate return variance, and their covariance: Z_{t} = left[1, {dp}_{t}, r_{t}^{omega}, triangle e_{t}, {var}_{t}^{{prime}r}, {var}_{t}^{{prime}e}, {cov}_{t}^{{prime}} right].
The set of instruments consists of a constant, the dividend-price ratio, the lagged equity return, plus a measure for the lagged equity return variance, exchange rate return variance, and their covariance as well as the yield spread, the change in the home risk free interest rate and the yield difference, which are included for technical reasons.
The existing evidence suggests that return variances across days of the week are not homoscedastic (e.g., Aggarwal and Schatzberg, 1997; Connolly, 1989).
The gambles differed in expected return and variance.
Subjects first design a portfolio, whereby each combination of assets yields the same expected return and variance of returns.
We capture the relative contribution of oil price shocks to the variations in the stock return using variance decomposition.
Particularly, epigenetic regulation helps interpret genetic variants, and in return functional variance in the epigenetic landscape can be identified through its relation to the genetic background.
