The aim of this paper is to present data to verify the process of mathematization in economic theory. For this we used two representative samples from three of the most in fluential academic journals in the years 1955-56-57 and the years 2015-16-17. Thus, a contingency table was drawn up,...

We propose a non-symmetric copula to model the evolution of electricity and gas prices by a bivariate non-Gaussian autoregressive process. We identify the marginal dynamics as driven by normal inverse Gaussian processes, estimating them from a series of observed UK electricity and gas spot data....