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Data for Good
I-sah Hsieh 0
Navigating big disasters with big data

Population movement is higher than ever. Buoyed by freedom of movement and critical events such as armed conflict and the European migrant issue, large groups of people are migrating across borders. In fact, population movement has now reached record levels. There are currently more displaced people globally than during the whole

Rick Wicklin 0
The CUSUM-LAG trick in SAS/IML

Every year near Halloween I write a trick-and-treat article in which I demonstrate a simple programming trick that is a real treat to use. This year's trick features two of my favorite functions, the CUSUM function and the LAG function. By using these function, you can compute the rows of