Akademik Veri Yönetim Sistemi
AQUACULTURE ECONOMICS AND MANAGEMENT, cilt.2026, ss.1-21, 2026 (SCI-Expanded, Scopus)
Seafood markets are increasingly becoming global as moreand more countries and species are sharing a common pricedetermination processes. This study examines spatial marketintegration in Istanbul fish market and import prices toT€urkiye employing non-linear autoregressive distributed lag(NARDL) model and the frequency-domain Granger causalitytest. The sample period covers a significant regulatory reformdesigned to enhance the functioning of Turkish wholesalefood markets, streamline the supply chain between producersand consumers, and lower prices at the retail level. Using themodel, estimations are conducted for the full sample andpost-reform periods to understand the impact of the reformon market integration. The estimation results show there is nolong-run asymmetry in either the full sample or the post-lawperiod, but short-run asymmetry is present in the market. Inthis sense, the amendment to the wholesale market law doesnot lead to any change in price asymmetry. In addition, verti-cal market integration is established between the domesticand imported fish prices. After the reform, the statistically sig-nificant and relatively higher price elasticities compared to thefull sample period indicate stronger market integration, sug-gesting that the law has, at least to some extent, enhancedmarket efficiency.