9 problems
micro, macro, s
tatistics
HEC Montréal
Year 1 practice Full solutions
every step worked o
ut
Intro micro, intro macro and intro statistics: supply and demand, costs, GDP,
money, probability and tests.
Unofficial practice based on public course descriptions for this level. Not affiliated with or
endorsed by HEC Montréal.
, Micro · Problems 1 to 3 HEC Montréal · Year 1 style
Shutdown, markups and inequality
Problem 1 Problem 2 Problem 3
Shutdown rule Markup pricing Lorenz curve
P = $12. At the best output q = 50: ATC = A monopolist faces a demand elasticity Income shares by quintile, poorest first:
$18, AVC = $14. of −4. MC = $30. 5%, 10%, 15%, 25%, 45%.
1. Loss if the firm produces? 1. Profit-maximizing price? 1. Area under the Lorenz curve?
2. Loss if it shuts down? 2. Lerner index? 2. Gini coefficient?
3. Decision? 3. Top-to-bottom quintile ratio?
Unofficial practice · Solutions on the next page · HEC Montréal Year 1 style · 02