Comparing demand functions when different price manipulations are used: does unit price help?

Area of Science:

• Behavioral economics
• Animal behavior
• Operant conditioning

Background:

• Understanding how economic principles, like price changes, affect animal behavior is crucial for behavioral economics.
• Previous research has explored demand elasticity in animals, but the specific impact of different 'price' manipulations requires further investigation.

Purpose of the Study:

• To investigate how varying response requirements (number vs. force) influence food-seeking behavior in hens.
• To compare the resulting demand functions under different price analogues in operant conditioning paradigms.

Main Methods:

• Six hens were trained to peck a key or push a door for food reinforcement.
• Response requirements were manipulated by increasing the number of responses or the force needed per response.
• Rates of consumption were plotted logarithmically against these price analogues to generate demand functions.

Main Results:

• Increasing the number of required responses resulted in linear demand functions with slopes near -1.0.
• Increasing the force of each response produced curved demand functions with progressively steeper downward slopes.
• The concept of unit price did not fully reconcile the differences observed between the two price manipulations.

Conclusions:

• Response number and response force act as distinct price analogues, yielding different demand curve shapes in hens.
• The differing time costs associated with each response unit appear to be the primary reason for these divergent effects.
• These findings contribute to a nuanced understanding of price elasticity and demand in animal behavior.