The phrase "accurate proxy" is correct and usable in written English.
It can be used when referring to a representative or substitute that reliably reflects or represents something else, often in contexts like data analysis, research, or statistics.
Example: "In our study, we used an accurate proxy for measuring the participants' overall health."
Alternatives: "reliable substitute" or "valid representative".
(Previous work has shown that this is an accurate proxy for strength).
The results indicate that ELM is a faster and more accurate proxy simulator than ANN and SVM.
The new concept seems promising as a platform towards more accurate proxy functions for dissolved contaminant transport in intact soil.
Consequently, marketers often mistake engagement with their content as an accurate proxy for purchase progress and, as a result, prematurely (or belatedly) pass opportunities on to sales.
Like the probabilistic model, the positive law model provides an accurate proxy for the reasonableness of police practices in many cases.
Bramley-Alves, J., Wanek, W., French, K. & Robinson, S. A. Moss δ13C: an accurate proxy for past water environments in polar regions.
And for some businesses, of course, they are very accurate proxies for performance—subscriber-based magazines are a case in point.
Indeed, none of the studies cited above use direct measures of productivity and therefore have to rely on more or less accurate proxies.
Firstly, studies using firm-level panel data on productivity conclude that it is not clear to what extent categories such as occupations are actually accurate proxies for productivity (Gottschalk 1978; Kampelmann and Rycx 2012).
But, alas, lab animals and wildlife are often not accurate proxies for what might happen in humans due to differences among species or exposure scenarios.
Another limitation of this study was the reliance on area-level measures of SES that might not have served as accurate proxies for the SES of individuals or specific families or households.
