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Taking Turkey’s experience as a case study, this study provides further insights into the evaluation of time-varying Granger-causal relationships in the trade openness and economic performance nexus. We reinvestigated the Granger-causal relationships between trade openness and real economic growth in Turkey for the time period 1950–2014. We employed a rolling version of Breitung and Candelon’s frequency domain Granger-causality test, which allowed us to identify the changes in the nature of the causal relationships overtime. Hence, in the face of different results found in the literature overtime, our study provides a more unified evidence on the relationship between trade openness and real economic growth in Turkey. In addition, we found empirical evidence for the possibility of a distinct temporal ordering in a feedback relationship between trade openness and economic growth. We called this situation “sequential feedback”.

This paper employs Hong's (2001) causality-in-mean and causality-in-variance tests to investigate the spillovers between business confidence and stock returns for the four economically distressed Southern European countries, namely Greece, Italy, Spain, and Portugal. The sample uses monthly data and covers the period from January 1988 to December 2010. Our causalityin-mean results indicate that there is feedback relationship between stock returns and business confidence in Portugal. The direction of causality-in-mean runs from business confidence to stock returns in Italy, but it is in the reverse direction in the case of Spain. Nevertheless, there is still evidence of a contemporaneous interaction between business confidence and stock returns in both Italy and Spain. On the other hand, causality-in-variance indicate the presence of volatility spillovers from business confidence to stock returns in Portugal, while a causal relationship is found in the current month in the case of Italy. Business confidence causes stock returns only in the mean in Greece. These results indicate that the stock market and business confidence relationship has its own idiosyncratic properties and that the stock market reactions to the current macroeconomic environment and expectations about the future developments might evolve differently in each country.

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This study investigates the presence (or lack thereof) of nonlinear dynamics and nonstationarity in international art market prices using quarterly data for the period 1990-2011. We first test whether art market price indices follow stochastic trends or whether they are stationary by means of linear unit root tests. Next, we estimate the Markov regime-switching ADF model and test whether the linear or the nonlinear regime-switching model provides a better characterization of the global art market price series. We find that all art market price indices (except for Drawings) exhibit nonlinearity. To our knowledge, our study is the first one in the literature to suggest that a nonlinear (Markov regime-switching) model provides a better characterization of the behavior of price dynamics in international art markets. In particular, our findings indicate that the market for the overall global art market, paintings, old 123 676 E.İ. Çevik et al. masters, sculptures, photographs, prints, and contemporary art might indeed be stationary while exhibiting nonlinear regime-switching properties. On the other hand, the market for drawings and the Nineteenth century art are found to be nonstationary. Overall, despite the common ground of a regime-switching framework, we still find that the sub-segments of the art market have their own inner regime switching dynamics and hence they can evolve differently overtime.