HIGHLIGHTS
- who: Hongyou Lu and colleagues from the Concentrations? Evidence from China Economics and Management School, Wuhan University, Wuhan, China have published the article: Do Urban Subway Openings Reduce PM2.5 Concentrations? Evidence from China, in the Journal: (JOURNAL) of 30/01/2018
- what: There are the following reasons why the OLS estimates are biased and the test statistics are invalid.
- how: The result indicated that the total subway mileage daily passenger flow and intensity of passenger flow were negatively related to PM2.5 concentrations while the relationship between new-built mileage and PM2 . . .
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