Which of the following statements is true about the U.S. health care delivery system?
1) It follows neither the highly regulated single-payer model nor a free market model
2) Prices charged for health care services remain less than the true economic costs of production
3) Since it follows the highly regulated single-payer model, utilization remains largely checked
4) Costs incurred in health research and development (R&D) are excluded from total health care expenditures