Shanghai Airlines, Shandong Airlines, Shenzhen Airlines, Sichuan
Airlines, Xiamen Airlines, Okay Airways, Spring Airlines and
Chongqing Airlines, is used. This data set is from the third quarter of
2004 to the first quarter of 2009 (although the complaints and
baggage mishandling information of the fourth quarter of 2005 and
the second quarter of 2006 is not available as the CAAC did not
publish this). The CAAC stopped publishing the information on
baggage complaints after the first quarter of 2009. Altogether there
are 172 observations in the data set.
The data set is basically derived from three sources. First, as
discussed, the quarterly data of customer complaints, baggage
handling and information of on-time performance of scheduled
flights are obtained from the issues of China Civil Aviation (Zhongguo
Minyong Hangkong) which directly publish the announcements
or press releases of the CAAC, and the website of the CAAC.
These complaints are received by the CAAC and their validity has
been checked. The number of flights and revenue-ton-kilometer
information is obtained from the Statistical Data on Civil Aviation
of China published by the CAAC. The quarterly weather information
of humidity, rainfall and temperature is calculated from the
monthly provincial data published in the China Meteorological
Yearbook.