Policy prescriptions. List the costs and benefits of the following hypothetical policies.

1. The US government offers a $5 billion prize to the first drug company that develops a cure for Alzheimer's disease.
2. bThe patent length for drugs to treat fatal diseases is reduced to five years, and all current patents for such drugs that are already more than five years old instantly expire.
3. cThe European Medicines Agency announces that it will instantly approve new drug applications that have shown any promise in treating Creutzfeldt-Jakob disease (also known as mad cow disease), even if there are safety concerns or if the evidence of efficacy is not conclusive.
4. dThe US government allows patients to write themselves prescriptions on weekends, when physicians are typically not available.