We test the nature of weak form informational efficiency present in wine market using daily return LIV-EX 50 index from 1/1/2010 to 12/6/2020. First, we employ a number statistical tests including variance ratio tests, for linear and non-linear dependence Hurst coefficient. The are applied on full dataset four non overlapping sub-samples equal length. provide mixed regarding efficiency. Evidenc...

This study analyzes the market quality differences, in terms of liquidity and volatility, between Real Estate Investment Trusts (REITs) and non-REIT common stocks. The 2008 financial crisis has significantly influenced the market quality for REITs. Our findings reveal intraday patterns indicating a lower liquidity, higher volatility, and greater price impact for REITs than nonREITs for pre-cris...

This paper investigates the pricing of differentiated products in a vertical sector, with a focus on the role of industry concentration. We propose concentration indices that extend the classical Hirschman-Herfindahl Index (HHI) to include vertical structures that manage differentiated products. We also identify how substitution/complementarity among products affects pricing. We compare our pro...

the experience of countries that have liberalized their electricity markets has shown that the assumption that markets will naturally produce a competitive result is not always justified. the most important concern refers to the changes of demand and price which result in providers’ mistreatment. market power is typically defined as the ability to profitably alter prices away from competitive l...

in this paper, the random walk hypothesis and the opec oil market efficiency have been examined. the random walk hypothesis states that prices are completely stochastic in nature so that they have 'no memory'. in its weak-form, changes in prices occur stochastically and, as a result, the random walk behavior of prices is usually used to test the weak-form efficiency. in order to study the rando...