Entry, Exit, and Long Run Profitability — End of Chapter Problem For each market, determine whether each market is likely to have sufficient barriers to entry to allow individual firms to make positive economic profits in the long run. Classify each market as possessing sufficient barriers to entry or not possessing sufficient barriers to entry. Sufficient barriers to entry No significant barriers to entry Answer Bank the market for lawn-care servicesthe market for wireless telecommunications (such as mobile phone service) the market for sport-utility vehicles the market for aspirin