4 Module 4 4 Module 4 4.1 Welfare Theory 4.1 Welfare Theory 4.1.1. Raustiala and Sprigman, 'When are IP Rights Necessary? Evidence from Innovation in IP's Negative Space' (Edward Elgar Publishing, 2016) Raustiala and Sprigman, 'When are IP Rights Necessary? Evidence from Innovation in IP's Negative Space' (Edward Elgar Publishing, 2016) 4.1.2. Jolls, Sunstein, and Thaler, A Behavioral Approach to Law and Economics, pp. 1471-1489 Jolls, Sunstein, and Thaler, A Behavioral Approach to Law and Economics, pp. 1471-1489