HOW DOES THE INTERNET INFLUENCE PRICE DISPERSION? EVIDENCE FROM THE AIRLINE INDUSTRY*
研究了互联网普及对同一航线内和不同航空公司之间机票价格水平及离散程度的影响，发现互联网普及降低了平均票价并增加了公司内部价格离散，但对公司间价格离散无显著影响。
I estimate the Internet's effect on the level and dispersion of airline fares on a given route within and across firms. The results suggest that increases in Internet penetration reduce average price and lead to higher intrafirm price dispersion, while increases in Internet penetration do not affect interfirm price dispersion on a given route. Internet penetration affects average fares most in competitive markets. These results suggest that the Internet has significantly but subtlely influenced domestic airline competition. The effect of the Internet on prices and price dispersion is larger on direct flights.