Carbon dioxide (CO2) emissions are widely believed to be a
driver of global climate change. In this problem set you will use
cross-section data to test what drives countries’ “carbon
footprints,” that is, their CO2 emissions. Is it population, or is
income the bigger culprit?
The data set “CO2 by country 2010 sh S17” contains data on a
sample of countries’ CO2 emissions, in kilotons; population, in
millions; and gross national income (GNI), in millions of US
dollars, for the...