A distinct supplemental usage describes social economics as "a discipline studying the reciprocal relationship between economic science on the one hand and social philosophy, ethics, and human dignity on the other" toward social reconstruction and improvement[4] or as also emphasizing multidisciplinary methods from such fields as sociology, history, and political science.[5] In criticizing mainstream economics for its alleged faulty philosophical premises (for example the pursuit of self-interest) and neglect of dysfunctional economic relationships, such advocates tend to classify social economics as heterodox.[6]