Lieberson, Stanley <br/><br/>
Making it count :  the improvement of social research and theory. 

 - Berkeley :  University of California Press,  1987. 
 - 257p. 
<br/><br/> SUMARIO: Preface - Introduction - Selectivity - Comparisons, counterfactual conditionals, and contamination - Asymmetrical forms of causation - Variation, level of analysis, and the research question - Control variables - More about current practices - And now what? - Rethinking causality - From controls to outcomes - Further suggestions - Notes - References - Index 
<br/><br/><label>ISBN: </label>0520060377 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ANALISIS<br/>INVESTIGACION SOCIAL<br/>METODOLOGIA DE LA INVESTIGACION<br/>TEORIA<br/>VARIABLES
<br/><br/><label>Dewey Class. No.: </label>300.18/L.716