"opportunity cost" conception---Who came up with it?

It was an Austrian, no?

Yes. Friedrich von Wieser.

Not that Wikipedia is always correct, but… [link]

Wiki:

lol. Good grief, does EVERYTHING have to be controversial?

Wikipedia says J.S. Mill; Jasay credits Bastiat; Otteson claims that Smith was the first.

ok, a search of “opportunity cost” at Mises.org turns this up…

Richard Cantillon and the Discovery of Opportunity Cost, by Mark Thornton.

Thornton argues—of course!!—that Cantillon oringally conceived of opportunity cost. I haven’t read the paper, so I don’t know his argument. On the “Weiser vs. J.S. Mill” origination issue, it looks like it begins with Stigler…

Didn’t know this was a whole thing. Wow, so many knowledge gaps in economics.

Edit: The trouble seems likely due to different historians/observers, when referring to this issue, fail to distinguish between: on the one hand (a) the first formal theoretical statement and definition of opportunity cost (or some such term) in the history of economic thought; and on the other hand (b) the first INFORMAL (and/or incomplete) discussion of the idea.

Just like I did here with my OP. In my case, I just assumed that the original conception and the formal definition arose together.

  1. Cantillon used opportunity cost, in the sense that a student foregoes wages while getting ability to work in a more complex job, and so that is why that job pays more

  2. However, Cantillon did not make a theory of opportunity cost, and his essay, written in 1730, was only published in 1755.

  3. Ettiene Bonnet de Condillac, in Appendix on Freedom to his Treatise on Sensations, published in 1754, builds opportunity costs literally as “regret cost” into the basic reason why people make the choices that they do, while they are guided by expected pleasure and pain.

  4. Condillac posits a statue, just gaining the use of senses of sight, taste, etc, etc., the moment after it makes its first behavior by reflex of nerves and sensory organs, it afterwards has memory and may choose what to do next: do nothing, which is now a conscious action, or move to attempt to consciously repeat the formerly unconscious behavior, because it remembers the pleasure or pain it got from the action, and uses it to compare the options.

  5. Thence, as soon as memory exists, and the first behavior is done, all further behaviors in a person are actions (this is the sense Mises used action–even nonbehavior is a conscious decision at that point).

  6. Having acted, afterwards, the cost is not merely physical, that is, the pain it recieves from wrong action, but also the foregone pleasure that would have been the next best alternative must be remembered and regretted.

  7. All costs are subjective, and in every action, a thinking subject expects a particular cost to an action, and prefers the pleasure of the action to the cost.

Condillac’s Appendix is basically equivalent to much of Mises’ human action insofar as why is determinism compatible with human action and what makes human action different from reflex (Condillac says habit or unintentional behavior).

  1. In 1776, Condillac uses the concept in his economics book, but he had already made a long discussion of the subject at the core of his analytic philosophy.

here’s excerpts from wiki:

I think he was onto something. Seriously, though, Condillac seems pretty cool.

Yes, Bonnet de Condillac had a whole list of entirely modern understanding of things that harm commerce. He is much more free market than Adam Smith. For instance, he believed any taxes on wages are, as they are indeed, an order to work less, and suggested, if any taxes at all, flat tax on property (land in his time) as payment for its defence, no more no less.