Coefficients look at marginal change (see comment on scale of change). What is important is that the marginal impact is rarely a straight line, so as the quality / extent of the capital changes the marginal impact will change too (e.g. climate chnage tipping points). So, what is important here is to confirm that the coeffient being applied was calculated based on the prevailing quality / extent of the capital of question. ie. does the context for its application more or less match the content where the coefficient was developed.

But again, this is more a question about application than development of coefficients per se.