How to pronounce“explanandum”in English

determining the explanandum?

The explanans, explanandum are the singular, these are the plurals of those.

economicus, and the deviations are construed as the explanandum, the phenomena to be explained.

We use it constructively, so as to define or put together the explanandum to be explained.

Again, it might be a matter of learning to use the old version for setting the explanandum while construing a new version as

And then very briefly, I mean, if individual behavior indeed is the explanandum, then what we need

And what exactly are the explananda, the things to be explained?