{"var_name":"country","var_def":"country","type":"cs_id","can_be_na":0}
{"var_name":"region","var_def":"region","type":"factor","can_be_na":0}
{"var_name":"income","var_def":"income","type":"factor","can_be_na":0}
{"var_name":"year","var_def":"year","type":"ts_id","can_be_na":0}
{"var_name":"time","var_def":"as.numeric(as.character(year))-1960","type":"numeric","can_be_na":0}
{"var_name":"gdp","var_def":"NY.GDP.MKTP.KD","type":"numeric","can_be_na":0}
{"var_name":"population","var_def":"SP.POP.TOTL","type":"numeric","can_be_na":0}
{"var_name":"gdp_capita","var_def":"NY.GDP.PCAP.KD","type":"numeric","can_be_na":0}
{"var_name":"extdebt_gni","var_def":"DT.DOD.DECT.GN.ZS","type":"numeric","can_be_na":1}
{"var_name":"debtservice_gni","var_def":"DT.TDS.DPPG.GN.ZS","type":"numeric","can_be_na":1}
{"var_name":"grossdomsavings_gdp","var_def":"NY.GDS.TOTL.ZS","type":"numeric","can_be_na":1}
{"var_name":"exports_gdp","var_def":"NE.EXP.GNFS.ZS","type":"numeric","can_be_na":1}
{"var_name":"imports_gdp","var_def":"NE.IMP.GNFS.ZS","type":"numeric","can_be_na":1}
{"var_name":"resdevelop_gdp","var_def":"GB.XPD.RSDV.GD.ZS","type":"numeric","can_be_na":1}
{"var_name":"govtspendeducation_gdp","var_def":"SE.XPD.TOTL.GD.ZS","type":"numeric","can_be_na":1}
{"var_name":"healthexpenditure_gdp","var_def":"SH.XPD.CHEX.GD.ZS","type":"numeric","can_be_na":1}
{"var_name":"militaryexpenditure_gdp","var_def":"MS.MIL.XPND.GD.ZS","type":"numeric","can_be_na":1}
{"var_name":"co2_emissions_capita","var_def":"EN.ATM.CO2E.PC","type":"numeric","can_be_na":1}
{"var_name":"unemployment","var_def":"SL.UEM.TOTL.ZS","type":"numeric","can_be_na":1}
{"var_name":"giniindex","var_def":"SI.POV.GINI","type":"numeric","can_be_na":1}
{"var_name":"literacy_rate","var_def":"SE.ADT.LITR.ZS","type":"numeric","can_be_na":1}
{"var_name":"childmortality","var_def":"SH.DYN.MORT","type":"numeric","can_be_na":1}
{"var_name":"lifeexpectancy","var_def":"SP.DYN.LE00.IN","type":"numeric","can_be_na":1}