Project Title：Taiwan Institute for Governance and Communication Research (TIGCR), 2018: Political Polarization Survey (TIGCR-PPS 2018)

Principal Investigator： Chi Huang

Co-principal  Investigator： Chingching Chang

Executive Institution：Taiwan Institute for Governance and Communication Research

DOI：10.6923/TW-TIGCR-PPS2018

Sample size: 2,484

Interviewed between: 7/9-11/23, 2018

Data revised:

March 1, 2021.
1. The sample id (variable name is "id") is recoded as 8 digits due to combind the 2019's panel data conveniently. The original sample id in 7 digits renamed from "ID" to "id2".
2. The interviewer's id renamed from "NO" to "no".
3. Several interviewees' birth year and month (variable "vP2gp2a" and "vP2gp2b")  have been confirmed and corrected according the interview in 2020's panel survey .
4. Adding two variable: (1) "AGE" for the interviee's age on the staring day of 2018 survey (June 30, 2018). (2) "AGE_2018_voting_day" for the interviee's age on the voting day of Taiwan's 2018 election (November 24, 2018).
5. The code 90. "Other", 91. "All", 92. "None at all", 94. "It's hard to say", 95. "No opinion", 96. "Skip", 97. "Don't know", 98. "Refuse to answer," and 99. "Missing" of the four variables, vPD2, vPD3, vPD5, and vPD7, has been recoded as 990. "Other", 991. "All", 992. "None at all", 994. "It's hard to say", 995. "No opinion", 996. "Skip", 997. "Don't know", 998. "Refuse to answer", and 999. "Missing" due to the codes of important policy and issue have been used up.

March 19, 2021.
1. Add variable "ENDTIME" to note the interview ended time in the format YYYYMMDDhhmmss.