Measuring Willingness to Pay for Environmental Attributes in Seafood
James Hilger, Eric Hallstein, Andrew W. Stevens, Sofia Villas-Boas
Environmental and Resource Economics, vol. 73, 2019, p. 307-332.

Expert Opinion and the Demand for Experience Goods: An Experimental Approach in the Retail Wine Market
James Hilger, Greg Rafert, Sofia Villas-Boas
Review of Economics and Statistics, vol. 93, 2011, p. 1289-1296.