Sue Ashford, a professor at the University of Michigan’s Ross School of Business, breaks down her decades of research on leadership—who achieves it, and how a group grants it. She explains that the world isn’t divided into leaders and followers. Instead, it’s a state that everyone can reach, whether they’re officially in charge or not. She also explains why shared leadership benefits a team and organization. Ashford offers tips on how to effectively grow leadership in yourself and your employees.

History hangs heavy at the Frari, and computer scientist Frédéric Kaplan likes it that way. He has an ambition to capture well over 1,000 years of records in dynamic digital form, encompassing the glorious era of the Most Serene Republic of Venice. The project, which he calls the Venice Time Machine, will scan documents including maps, monographs, manuscripts and sheet music. It promises not only to open up reams of hidden history to scholars, but also to enable the researchers to search and cross-reference the information, thanks to advances in machine-learning technologies.

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Taking advantage of the ‘customers who bought this item also bought’ feature of online commerce, this study constructed a co-purchase network of political books and science books. Researches found a clear division, which they label “partisan differences in the consumption of science”.

Both groups bought science books — more than 400,000 between them. But it was relatively unusual to find books that appealed to both liberals and conservatives. Members of each group — and their good friends — had different ideas about what made a good book. Buyers of “blue books” (the liberals) tended to pick from basic science topics, including physics, astronomy and zoology. “Red” customers preferred books that discussed applied and commercial science, such as medicine, criminology and geophysics. And whereas liberal choices tended to reflect mainstream thinking, “red books” tended to be co-purchased with a narrower subset of science books on the fringes of each subject.

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