Econ question

2. Consider the data on the following 6 countries: (1) (2) (3) (4) GDP per capita in 2015 GDP per capita in 2015 |Real GDP per capita (PPP) Country U.S. $ using exchange rates international dollars in 1980 in 2018 Austria 44,268 49,955 31,380 55,411 Bolivia 3,051 7,116 6,029 8,634 Denmark 53,479 49,265 31,936 56,223 Egypt 3,731 11,958 5.081 11,521 Thailand 5,840 15,822 3,919 18,087 U.S.A. 56,849 56,849 31,984 61,578 (a) (6 points) Compare the values in columns (1) and (2) and interpret any differences for Austria, Bolivia and Denmark. Explain the underlying reason for your observations. (b) (2 points) There are two reasons why the data from column (2) is preferred to column (1), one of which you should have mentioned in the previous part. What is the second reason