These are the data in Newhouse's (1977) simple OLS model from 1977. In his case, he's trying to explain medical care expenditures as a function of GDP per capita for these countries. It's probably the easiest OLS model I can find in print because Newhouse helpfully provides all the data in one simple table.
A data frame with 13 observations on the following 5 variables.
a character vector for the country
a numeric vector for the year
a numeric vector for the per capita GDP in USD
a numeric vector for the medical care share as percentage of GDP
a numeric vector for per capita medical care expenditure (in USD)
Table 1 in Newhouse (1977) is well-annotated with background information.
Newhouse, Joseph P. 1977. "Medical-Care Expenditure: A Cross-National Survey." Journal of Human Resources 12(1): 115-125.