Based on the panel data of Beijing, Tianjin and Hebei from 2004 to 2016 and the obvious changes of the industrial transfer caused by the policy coordinating development of Beijing-Tianjin-Hebei as a national strategy in 2014, this paper makes a regression discontinuity on the exogenous impact of the policy on the development in Hebei. The results show that: Firstly, in 2015, the amount of industrial transfer from Beijing-Tianjin to Hebei has increased nearly three times than that of 2014.

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... ly, the contribution rates of the policy to the increase of per capital gross regional product and rural per capita net income are 47.8% and 62.3% respectively. Thirdly, the policy has different effects on different regions, the central and eastern areas of Hebei are the most policy-sensitive which made the Theil of these areas fall by 0.1%.