In a symmetry-integration diagram, illustrate how each of the following scenarios affects the position of the OCA line and the likelihood that a given country (Country A) will join the currency union. Assume that Country A starts off as indifferent between joining a currency union versus keeping its national currency.

a. The currency union adopts a program of fiscal transfers to alleviate output losses in regions experiencing recession.

b. The new chair of Country A’s central bank announces she is committed to reducing the inflation rate from 3% to 2% over the next year. The inflation rate in the currency union is currently 4%.

c. The currency union admits a new country, Country B, that has a higher inflation rate than other countries in the currency union.

d. Negotiations between Country A and the currency union lead to the adoption of a new program that creates uniform labor market regulations across the region. 

e. Leaders in Country A and the currency union countries decide to form a military alliance against another region.