An ADB report summarizes surveys of firms about their preference utilization under Asian PTAs:

ADB conducted firm-level surveys in six countries, the results of which are published in the book Asia’s Free Trade Agreements: How is Business Responding? Experts in the region looked at the issues using firm surveys in Japan, China, Korea, Singapore, Thailand and the Philippines.

This book asks four important questions concerning the spread of FTAs and the Asian noodle bowl: Are FTA preferences being used by firms? What are their costs and benefits? Are multiple ROOs a burden to business? Is there enough business support for firms to use FTAs?

[HT: LWS]