Couper, Mick P. 2011. "The Future of Modes of Data Collection." Public Opinion Quarterly, 75(5): 889-908.
This article reviews recent trends in modes of survey data collection, with a view to speculating on the future of survey modes. I discuss the development of the idea of modes, review the many dimensions of mode, briefly review some of the research on mode differences, discuss recent developments in mixed mode surveys, and offer some thoughts on the likely future of modes of survey data collection.