A. What kind of market structure is involved in the sale of medicines and vitamins? Justify your answer.

B. What can be said about barriers to entry in this market?

C. Might there be a change in the market structure after the change in the law?

D. The government implemented the EO 104 "Improving Access to Healthcare through the Regulation of Prices in the Retail of Drugs and Medicines" or the Maximum Drug Retail Price (MDRP) which subjected essential drug molecules to price review by a joint TWG of the DOH and DTI. The technical working group (TWG) of the Department of Health and Department of Trade and Industry has set a wide price difference of between zero to 93 percent between the prevailing and proposed maximum retail prices for the additional list of drugs identified for mandatory price cuts under Executive Order 104. Explain the disadvantages and possible impacts of this law as far as market structure is concerned.