By combining economic and financial data for Portuguese manufacturing firms with data on their exports and imports, we uncover some aspects of the relationship between international trade engagement and firms’ performance. In line with recent theoretical and empirical developments in the international trade literature: (i) we testify that Portuguese international trade is highly concentrated, e...

The Pacific oyster (Crassostrea gigas), originally from East Asia, has been the main species of oyster farmed in Europe since the early 20 century. Populations were heavily hit by disease in the 1960s and 1970s and thousands of tons of Pacific oysters from Canada and Japan were subsequently imported to replenish French farm stocks. However, a number of other species inadvertently arrived with t...

We develop a model of vertical pricing in which an original manufacturer sets wholesale prices in two markets integrated at the distributor level by parallel imports (PI). In this context we show that if competition policy requires uniform wholesale prices across locations it would push retail prices toward convergence as transportation costs fall. However, these retail prices could be higher t...

In the present study Iran’s rice imports trend is forecasted, using artificial neural networks and econometric methods, during 2009 to 2013, and their results are compared. The results showed that feet forward neural network leading with less forecast error and had better performance in comparison to econometric techniques and also, other methods of neural networks, such as Recurrent networks a...

Abstract Russia's invasion in Ukraine has led to substantial restrictions on exports Russia, which some East Asian economies have joined. We review the importance of as providers technology imports for Russia and present a preliminary analysis development Russian from Asia after invasion. find that been important suppliers goods Russia. After February 2022, most countries dropped substantially....