Please answer two questions after reading the following article.

Chen, Ting, and James Kung. 2019. "Busting the 'Princelings': The Campaign against Corruption in China's Primary Land Market." Quarterly Journal of Economics, 134(1), pp.185-226.

Article PDF link:

https://academic.oup.com/qje/article/134/1/185/5140154

Question:

(a) "The relationship between price discount and enhanced promotional prospects is more than just spurious." Discuss with respect to the methodology employed and findings obtained in Chen and Kung (2019).

(b) Was China's anti-corruption campaign effective? Under what circumstances was this campaign most effective, why?