Final answer:
A public choice economist would most likely be interested in the study of Rent-seeking behavior, as it aligns with the principles of public choice economics regarding organized groups and policymaking.
Step-by-step explanation:
A public choice economist would most likely be interested in Rent-seeking behavior. Public choice, a subtopic of microeconomics, examines the economics of government policies and how organized groups and lawmakers interact to produce economic policy. Rent-seeking involves these groups trying to secure economic gain without reciprocating benefits to society, typically through lobbying or influencing regulations and policies to their advantage. This is directly connected to the theory of public choice, which questions why and how smaller, more organized groups work hard to impact policies, sometimes leading to undesirable economic outcomes.