Correlations between international equity market returns tend to increase in highly volatile bear markets, which has led some to doubt the benefits of international diversification. This article solves the dynamic portfolio choice problem of a US investor faced with a time-varying investment opportunity set modeled using a regime-switching process which may be characterized by correlations and ...

We investigate data tapering in two formulations of empirical likelihood for time series. One empirical likelihood is formed from tapered data-blocks in the time-domain and a second is based on the tapered periodogram in the frequency-domain. Limiting distributions are provided for both empirical likelihood versions under tapering. Theoretical and simulation evidence indicate that a data taper ...

The exactitude of petroleum fluid molecular weight correlations affects significantly the precision engineering calculations and can make process design trouble-shooting inaccurate. Some methods in literature to predict are used commercial software simulators. According statements made literature, Lee–Kesler Twu most engineering, other do not exhibit any significant advantages over correlations...

We study in this paper the consequences of using the Mean Absolute Percentage Error (MAPE) as a measure of quality for regression models. We show that finding the best model under the MAPE is equivalent to doing weighted Mean Absolute Error (MAE) regression. We show that universal consistency of Empirical Risk Minimization remains possible using the MAPE instead of the MAE.

This paper applies a value-based management framework to critically review empirical research in managerial accounting. This framework enables us to place the exceptionally diverse set of managerial accounting studies from the past several decades into an integrated structure. Our synthesis highlights the many consistent results in prior research, identifies remaining gaps and inconsistencies, ...

Methodological norms in economic theorising are interpreted as rational strategies to optimise some epistemic utility functions. A definition of ‘empirical verisimilitude’ is defended as a plausible interpretation of the epistemic preferences of researchers. Some salient differences between the scientific strategies of physics and of economics are derived from the comparison of the relative cos...

A generic fusion problem is studied for multiple sensors whose outputs are probabilistically related to their inputs according to unknown distributions. Sensor measurements are provided as iid input-output samples, and an empirical risk minimization method is described for designing fusers with distribution-free performance bounds. The special cases of isolation and projective fusers for classi...