Not in the US. See "portion distortion".
https://pmc.ncbi.nlm.nih.gov/articles/PMC1447051/
https://pmc.ncbi.nlm.nih.gov/articles/PMC8667835/
Edit: hamburgers and hotdogs are pretty standardized though
Unfortunately no mention of prices, so increase in portion sizes might be below inflation; and I suspect the former could be a strategy of compensation for inflation by making it seem less drastic ("yes it costs more, but we also made it bigger!")
Everyone knows what a quarter pounder is!
Unfortunately no mention of prices, so increase in portion sizes might be below inflation; and I suspect the former could be a strategy of compensation for inflation by making it seem less drastic ("yes it costs more, but we also made it bigger!")