In particular, a perfectly competitive firm's marginal cost curve is also its supply curve.This conclusion, however, only applies to perfect competition. Firms operating in market structures that do not equate price and marginal cost, but rather equate marginal revenue and marginal cost.s such, the marginal cost curve is not the supply curve for the firm.Long-Run ProductionIn the long run, with all inputs variable, a perfectly competitive industry reaches equilibrium at the output that achieves the minimum efficient scale, that is, the minimum of the long run average cost curve.
A tutor is an instructor who gives private lessons. Shadow education is a name for private supplementary tutoring that is offered outside the mainstream education system. Normally, a tutor will help a student who is struggling in a subject of some sort. Also, a tutor may be provided for a student who wants to learn at home.
Salary and Qualifications. The average salary for a full-time college tutor was $55,000 as of 2013, according to the job site Indeed. Most tutors have taken advanced courses in the subjects they tutor.hey earned average salaries between $49,000 and $65,000 per year in the Northeast, according to Indeed -- with lows in Pennsylvania and highs in New York. In the South, they earned lows of $47,000 in Louisiana and highs of $65,000 annually in Mississippi.