Roengchai Tansuchat

Production Efficiency in Pig Farming in Thailand: A Copula-Based Frontier Model

This study evaluates the technical efficiency of pig production in Nakhon Si Thammarat Province, Thailand, using a copula-based stochastic frontier framework that relaxes the conventional assumption of independence between stochastic noise and technical inefficiency. Farm-level d...

The economic impact of COVID-19: losses and resilience factors

This study proposes a numerical assessment of the economic loss associated with COVID-19 across 46 countries. We estimate these losses by forecasting each country’s counterfactual GDP, that is, the GDP that would have occurred in the absence of the pandemic, using a hybrid WT–QPS...