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Weekly links July 7: Making Jakarta Traffic Worse, Patient Kids and Hungry Judges, Competing for Brides by Pushing up Home Prices, and More…

Summary:
In this week’s Science, Rema Hanna, Gabriel Kreindler, and Ben Olken look what happened when Jakarta abruptly ended HOV rules – showing how traffic got worse for everyone. Nice example of using Google traffic data – MIT news has a summary and discussion of how the research took place : “The key thing we did is ...

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  • In this week’s Science, Rema Hanna, Gabriel Kreindler, and Ben Olken look what happened when Jakarta abruptly ended HOV rules – showing how traffic got worse for everyone. Nice example of using Google traffic data – MIT news has a summary and discussion of how the research took place : “The key thing we did is to start collecting traffic data immediately,” Hanna explains. “Within 48 hours of the policy announcement, we were regularly having our computers check Google Maps every 10 minutes to check current traffic speeds on several roads in Jakarta. ... By starting so quickly we were able to capture real-time traffic conditions while the HOV policy was still in effect. We then compared the changes in traffic before and after the policy change.”All told, the impact of changing the HOV policy was highly significant. After the HOV policy was abandoned, the average speed of Jakarta’s rush hour traffic declined from about 17 to 12 miles per hour in the mornings, and from about 13 to 7 miles per hour in the evenings”
  • From NPR’s Goats and Soda: 4-year kids of Cameroonian subsistence farmers take the marshmallow test, as do German kids – who do you think did best?
David McKenzie
David McKenzie is a Lead Economist in the Development Research Group, Finance and Private Sector Development Unit. He received his B.Com.(Hons)/B.A. from the University of Auckland, New Zealand and his Ph.D. in Economics from Yale University.

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