A daily roundup of fresh data from scholars, governments, think tanks, pollsters and other social science researchers.

Politics Paul, Ryan, Clinton top poll of potential 2016 candidates, CNN/ORC Less than half of voters say live TV is their main way to watch video, Public Opinion Strategies/Global Strategy Group Iowa voters support medical marijuana by almost 5-t0-1, Quinnipiac U. Wyoming leads in electing women to House over past quarter-century, U. of Minnesota

Economy Adjustable-rate mortgages make a comeback, Wall Street Journal Fewer small business loans going to black borrowers, Wall Street Journal U.S. economic policy uncertainty index lowest since 2007, Economic Policy Uncertainty

Health & Society Two-thirds of Americans satisfied with how healthcare system works for them, Gallup Obamacare shakes up insurance-market competition in seven states, KFF More colon testing leads to 30% drop in cancer rates, American Cancer Society Children who watch more TV get less sleep, JAMA And having a bedroom TV is associated with children’s weight gain, JAMA

International Why Ukraine can’t fight Russia, and other charts that explain the world, Politico Graphic on economic ties between Central/Eastern Europe, Russia, WSJ Stronger property rights for Indian women linked to more suicides, domestic abuse, NBER New data on 2013 international arms transfers, SIPRI Leading economic indicators rise for Spain, fall for Brazil, The Conference Board

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