This is a preview. Log in through your library . Abstract Many variables crucial to the social sciences are not directly observed but instead are latent and measured indirectly. When an external ...
James M. Nonnemaker, Paul D. Mowery, James C. Hersey, Christian T. Nimsch, Matthew C. Farrelly, Peter Messeri, M. Lyndon Haviland Nicotine & Tobacco Research, Vol. 6 ...
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