Smartphone and tablet effects in contingent valuation web surveys – No reason to worry? CategoryArticles Sub-Categoriesn/a Year2019 Author(s) Magnus Aagaard Skeie Henrik Lindhjem Sofie Skjeflo Ståle Navrud https://www.sciencedirect.com/science/article/pii/S092180091930076X?dgcid=author DownloadNo file