Quantitative social scientists have something of a catechism when it comes to providing evidence for causal assertions. If we want to assert that A is a contributing cause to B (for example, living in a neighborhood with many sub-standard housing units is a cause of higher rates of delinquency), we need to conduct a study involving a reasonably large number of cases and then assess whether cases with high-A values are also found to have high B-values. And in order to avoid well-known problems...
