Understanding the regional food security situation is of great importance to maintaining China’s food security. To provide targeted information to help regional policymakers monitor food security status, based on the differentiated foci during the phased development of food security, this...

We examine lead-lag relationships between new-building and second-hand ship prices. Our analysis shows the existence of a one-directional lead-lag relationship between two ship prices. The direction of lead-lag relationship is not affected by the time evolution and age of second-hand ships, but...

In this paper, we develop a general analytical method to compute clustering coefficients of growing networks. This method can be applied to any network as long as we can construct and solve the dynamic equation for the degree of any node. We also verify the accuracy of the method through simulation.