Economics focuses on the production and distribution of society’s goods and services. Economists study why a society chooses to produce what it does, how money is exchanged, and how people interact and cooperate to produce goods.
Measurements and categorizations in scientific work are also usually accompanied by estimates of their uncertainty or disclaimers concerning the scope of initial observations. The uncertainty is often estimated by making repeated measurements of the desired quantity. Uncertainties may also be calculated by consideration of the uncertainties of the individual underlying quantities that are used. Counts of things, such as the number of people in a nation at a particular time, may also have an uncertainty due to limitations of the method used. Counts may only represent a sample of desired quantities, with an uncertainty that depends upon the sampling method used and the number of samples taken (see the central limit theorem ). Similarly, the scope of initial observations may be recorded via count and / or qualitative assessments of the nature and method of previous studies, which allows researchers to expand and / or replicate categorizations dependent upon and contextualized via a specific scope of observational data.
Loïc Wacquant distinguishes three major strains of positivism: Durkheimian , Logical, and Instrumental.  None of these are the same as that set forth by Comte, who was unique in advocating such a rigid (and perhaps optimistic) version.   While Émile Durkheim rejected much of the detail of Comte's philosophy, he retained and refined its method. Durkheim maintained that the social sciences are a logical continuation of the natural ones into the realm of human activity, and insisted that they should retain the same objectivity, rationalism, and approach to causality.  He developed the notion of objective sui generis "social facts" to delineate a unique empirical object for the science of sociology to study. 
A printable version of Introduction to Sociology is available. ( edit it )