Recent quotes:

Morning Must-Read: Mary S. Morgan: Modelling as a Method of Enquiry - Washington Center for Equitable Growth

“Despite the ubiquity of modelling in modern economics, it is not easy to say how this way of doing science works… …Scientific models are not self-evident things, and it is not obvious how such research objects are made, nor how a scientist reasons with them, nor to what purpose. These difficulties of definition and understanding are exhibited in a most concrete fashion in an example that lays claim to being the first such research object in economics…