16. The following is an important theory in health economics. What is the name of the theory that

fits the following explanation?

“Hospital bed, once built and insured, will be filled.” The supply of hospital beds is a key determinant of utilization, especially where the public has health insurance benefits covering hospitalization. This ‘Law’ was 

modified by the experience of changing payment systems with incentives to reduce utilization.

① Taylor’s law

② Roemer’s law

③ Bunker’s law

④ Kaepernick’s law