This paper addresses the problem of modeling loss frequency using regression when the counts have a non-standard distribution. We propose a novel approach based on mixture-of-experts specifications on discrete-phase type distributions. Compared to continuous phase-type counterparts, our approach...

Tail Mean-Variance (TMV) has emerged from the actuarial community as a criterion for risk management and portfolio selection, with a focus on extreme losses. The existing literature on portfolio optimization under the TMV criterion relies on the plug-in approach that substitutes the unknown mean...

This paper aims to address the issue of semiparametric efficiency for cointegration rank testing in finite-order vector autoregressive models, where the innovation distribution is considered an infinite-dimensional nuisance parameter. Our asymptotic analysis relies on Le Cam's theory of limit...

This article introduces a multinomial logit model that uses ancillary information to control for uncertainty in both the observed choices made by respondents, and in the attributes of a respondent's choice set. Simulated data are used to compare the performance of this estimator versus simpler...

We use Markov chain Monte Carlo (MCMC) sampling to draw model coefficients to generate LGD distributions. We find that applying this Bayesian method on a sophisticated model that accounts for the bi-modal distribution of the LGDs, such as the zero-one-inflated beta (ZOIB) model, can generate LGD...

This paper proposes an extended multivariate EGARCH model for multivariate volatility modeling that addresses several limitations of existing models. Specifically, it overcomes the zero-return problem and allows for negative news and volatility spillover effects, making it a promising tool for...

This paper proposes maximum (quasi)likelihood estimation for high dimensional factor models with regime switching in the loadings. The model parameters are estimated jointly by the EM (expectation maximization) algorithm, which in the current context only requires iteratively calculating regime...

Under the production approach to markup estimation, the markup is the output elasticity of any variable input divided by the input’s share of revenue. However, output elasticities vary across producers due to non-neutral technological differences. I develop a flexible cost share estimator to...

This paper develops an analytical approach to compute the explicit asymptotic formulas for the probability that a time-inhomogeneous diffusion process does not cross a non-flat, lower/upper boundary. We derive the explicit formulas for the first four terms and provide the error bound. The...