I have found another chunk from the same source according to a comment made by Brent On April 11, 2019 at 4:37 am at this site: https://weeklysift.com/2019/04/08/alarm-bells/ The segment is as follows:
” When the economic environment is relatively poor, agents prefer the certainty of in-group interactions and eschew cooperation of out-groups. This, we argue, represents the sort of polarization of group identities that has been associated with the political and social developments described above.”
and the modified segment in his phd goes like this(at p.182) "In less extreme times, individuals prefer the certainty of in-group interactions and eschew cooperation of out-groups." Johnqw (Diskussion) 14:22, 10. Aug. 2021 (UTC)