Evaluating Agricultural Value Chains on CISS-F Framework

Technology, institutions and markets together drive agricultural value chains in becoming more competitive, inclusive, sustainable and scalable, and in improving access to finance. Institutions that focused on aggregating marginal and smallholders, empowering farmers with better bargaining power, inducing economies of scale and creating market linkages have been pivotal in the successful transformation of these sectors.

Market Definition in the Platform Economy

The article addresses the role market definition can play for EU competition practice in the platform economy. The focus is on intermediaries that bring together groups of users whose decisions are interdependent, which therefore are commonly referred to as ‘two-sided platforms’. We address challenges to market definition that accompany these cross-group network effects, assess current practice in a number of competition cases, and provide guidance for adapting practice to properly account for the economic forces shaping markets with two-sided platforms. We ask whether and when a single market can be defined that encompasses both sides. We advocate a multi-markets approach that takes account of cross-market linkages, acknowledges the existence of zero-price markets, and properly accounts for the homing behaviour of market participants.

Evidence of Stock Market Contagion during the COVID-19 Pandemic: A Wavelet-Copula-GARCH Approach

In this study, we propose a wavelet-copula-GARCH procedure to investigate the occurrence of cross-market linkages during the COVID-19 pandemic. To explore cross-market linkages, we distinguish between regular interdependence and pure contagion, and associate changes in the correlation between stock market returns at higher frequencies with contagion, whereas changes at lower frequencies are associated with interdependence that relates to spillovers of shocks resulting from the normal interdependence between markets. An empirical analysis undertaken on six major stock markets reveals evidence of long-run interdependence between the markets under consideration before the start of the COVID-19 pandemic in December 2019. However, after the health crisis began, strong evidence of pure contagion among stock markets was detected.