Research and development of OECD Countries from 1996 to 2014

I have collected this data to study the impact of investement in RD on the PISA scores. It contains data on 4 WDI indicators

• GDP in Current USD
• Population Size
• Research and development expenditure (% of GDP)
• Researchers in R&D (per million people)

I have computed also using these indicators 5 other indicators

• Total expenditure in RD (Current USD)
• Total number of researchers
• Expenditure by one researcher (Current USD)
• Number of articles produced by 100 researchers
• Cost of one article ((Current USD))

At the origin, some of the indicators contain missing observations. I have then used 3 Imputation algorithms (MICE, missMDA, KNN) to complete the missing values.