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The development of information and communications technology (ICT), particularly the Internet, has reduced trade costs. However, it remains unclear whether these reduced costs are reflected in the "extensive margins" of firms' exports (which refer to the probability of fi rms exporting) or the "intensive margins" (which refer to the value of fi rms' export). To test this, we used the concepts of information cost and binary margins, an augmented trade model of firm heterogeneity, a two-stage Heckman estimation, and data from the World Bank Enterprise Survey of Chinese fi rms in 2012. The results revealed that reduced trade costs from the use of ICT were positively related to extensive margins but that the connection with intensive margins was not signifi cant. The results lead to the conclusion that reduced information costs related to a firm's exporting behavior were primarily reflected in variable trade costs. This study offers theoretical and empirical evidence for China's policies towards the Internet, which are relevant for the export of manufactured goods. The government should encourage the use of ICT to enhance fi rms' export opportunities while facing current trade policy uncertainty.

Pollution loads pose a major threat to the health of the marine environment and the long-term viability of the coastal economy. The present study developed a coupling model to simulate the chemical oxygen demand (COD) transport in upper rivers (1D) and subsequent diffusion in the coastal zone (2D) in Liaodong Bay, based on the HydroInfo system. Three main seagoing rivers, including Daliao, Liao, and Daling Rivers, were selected and investigated for hydrodynamic and hydrochemical analyses. The mathematical model was evaluated by monitoring data from state-controlled cross-sections scattered along the three rivers, and the observation data showed good agreement with simulated values, confirming the model’s accuracy in terms of spatial and temporal distribution. The transport and propagation process of COD in inlet rivers, such as Daliao, Liao, and Daling, including the sea area of Liaodong Bay, were simulated and analyzed. Simulated results revealed that the pollution range of COD in Liaodong Bay was 258–391 km2 in different seasons. The pollutant leakage scenarios for the three rivers entering the sea were simulated utilizing the developed mathematical model. The study simulated and predicted that, in the event of a sudden water pollution accident (e.g., sneak discharge and leakage at various sections of sea-entering rivers, such as Daliao, Liao, and Daling), pollutants might take 2–11 days to reach the sea-entering mouth, and the sea area would take 8–32 days to reach the maximum pollution range. Our numerical modeling may be used to analyze and make decisions on pollution control in Liaodong Bay and major sea-entry rivers, and be useful to water environment management in sea-entry rivers and Liaodong Bay, and water pollution emergency responses.

Package travel tourists are explicitly protected as consumers under Article 6(4)(b) Rome I, but not under Article 17(3) Brussels Ibis since it does not even mention the term ‘package travel’. Such discrepancy is widened with the replacement of Directive 90/314 by Directive 2015/2302 with enlarged notion of package travel. As regards protecting package travel tourists as consumers with favorable jurisdiction and applicable law rules, this article argues that Article 17(3) Brussels Ibis is two steps behind Article 6(4)(b) Rome I. In order to close the gap, a uniform concept of package travel should be given. To this end, it is suggested that Article 17(3) Brussels Ibis should adopt the notion of package travel employed in Article 6(4)(b) Rome I. Despite this, these two provisions only cover packages containing transport, as an exception of transport contracts. Packages not including transport do not fall under the exception of transport contracts. Since all package travel contracts should be protected as consumer contracts, regardless of containing transport or not, it is more logical to delete the exception of transport contracts and create a separate provision to protect package travel contracts as consumer contracts.