I’m inclined to agree; I also remain unclear if any of the other major subfields of International Relations (IR) can point to the existence of significant settled findings, whether correlative or causal.
This matters, insofar as (some of the) major arguments for demarcating non-behavioral work from “political science” rest upon the putatively cumulative character of statistical and quasi-statistical work.
But what if, rather than producing (non-trivial) settled knowledge, such work largely involves cranking out the n+1th round of data crunching using different techniques, tweaked data sets, or new data sets? Then we have the form of “science” without the content necessary for claims of epistemological priority.
Or, as Patrick argues in his latest book,we lack the grounds for declaring so-called “non-mainstream” methodologies beyond the pale for IR scholars.