3. Data and summary statistics
3.1. Data
Our data comes from four different sources. Listing date and listing price are obtained
from the New Listing Securities Report compiled by the Investor Services and Information Section of the Stock Exchange of Thailand (SET). Company performance data before the
IPO are from prospectuses filed with the Securities & Exchange Commission of Thailand
as issuing firms are required to report up to 3 years of financial performance. Post-IPO
company performance is obtained from the PACAP Thailand Database. Lastly, information
on managerial ownership is found in the database compiled by the Manager
Information Services (Thailand). We restrict our study sample to a period prior to the
1997 Asian crisis to avoid the confounding effects of a market-wide external shock. In
addition, because we will access post-IPO performance for a 3-year period, we require the
firm to have gone public prior to 1994. During the years 1987 to 1993, 262 Thai firms
went public. We restrict our analysis to the sample of 133 firms for which we have
complete data. Thus, because we have data on more than half of the Thai firms that went
public during this time period, we feel we have a representative sample. Additionally, we
find that the firms used in our study are similar to those excluded from our study (e.g., with
regard to firm size, their industry membership, operating data, etc.), so we have no reason
to believe that sample selection biases will affect our results. Additional institutional
information that briefly describes the listing procedure is described on the SET website at
http://www.set.or.th and is outlined in Appendices A–C.
3. Data and summary statistics3.1. DataOur data comes from four different sources. Listing date and listing price are obtainedfrom the New Listing Securities Report compiled by the Investor Services and Information Section of the Stock Exchange of Thailand (SET). Company performance data before theIPO are from prospectuses filed with the Securities & Exchange Commission of Thailandas issuing firms are required to report up to 3 years of financial performance. Post-IPOcompany performance is obtained from the PACAP Thailand Database. Lastly, informationon managerial ownership is found in the database compiled by the ManagerInformation Services (Thailand). We restrict our study sample to a period prior to the1997 Asian crisis to avoid the confounding effects of a market-wide external shock. Inaddition, because we will access post-IPO performance for a 3-year period, we require thefirm to have gone public prior to 1994. During the years 1987 to 1993, 262 Thai firmswent public. We restrict our analysis to the sample of 133 firms for which we havecomplete data. Thus, because we have data on more than half of the Thai firms that wentpublic during this time period, we feel we have a representative sample. Additionally, wefind that the firms used in our study are similar to those excluded from our study (e.g., withregard to firm size, their industry membership, operating data, etc.), so we have no reasonto believe that sample selection biases will affect our results. Additional institutionalinformation that briefly describes the listing procedure is described on the SET website athttp://www.set.or.th and is outlined in Appendices A–C.
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