What are some of the positive and normative issues that lie behind the disagreements in the following cases?
a. Economists disagree on whether the government of Canada should try to stimulate the economy in the next six months.
b. European and North American negotiators disagree over the desirability of reducing European farm subsidies.
c. Economists argue about the merits of a voucher system that allows parents to choose the schools their children will attend.
d. Economists debate the use of a two-tier medical system in Canada (whereby health care continues to be publicly provided, but individuals are permitted to be treated by doctors who bill the patient directly—an approach known as “extra billing”).
e. Economists debate the costs of global climate change and the relative merits of carbon taxes and other policies to reduce greenhouse gas emissions.
f. Policymakers disagree about the extent to which financial markets need to be regulated.