{smcl} {* *! version 1.0.0 11july2016}{...} {findalias asfradohelp}{...} {title:pwcorrf} {phang} {bf:pwcorrf} {hline 2} Faster version of pwcorr, with builtin reshape option {marker syntax}{...} {title:Syntax} {p 8 17 2} {cmd: pwcorrf} {varlist} [{cmd:,} {it:reshape full showt}] {synoptset 20 tabbed}{...} {synopthdr} {synoptline} {syntab:Main} {synopt:{opt reshape}}calculates correlations of a single variable across panel groups {p_end} {synopt:{opt full}}forces full display of the correlation matrix{p_end} {synopt:{opt showt}}displays the number of joint observations per pair{p_end} {synoptline} {p2colreset}{...} {marker description}{...} {title:Description} {pstd} {cmd:pwcorrf} calculates the pairwise correlations across {varlist}. It returns the same results as {cmd:pwcorr}. Specifying the reshape option allows you to calculate correlations of a single variable across panel units. {marker options}{...} {title:Options} {dlgtab:Main} {phang} {opt reshape} reshapes your data wide, such that the correlation calculated is across panel groups, rather than across variables. Your data will be unaffected. {phang} {opt full} forces the program to show the full correlation matrix after execution. The default is to show the first 6x6 matrix of correlations. {phang} {opt showt} forces the program to show the matrix of the number of joint observations per pair. This matrix can always be assessed by calling r(T). {marker remarks}{...} {title:Remarks} {marker remarks}{...} {title:Remarks} {pstd} For detailed information on the original command, see {helpb pwcorr}. {cmd:pwcorrf} is (usually) faster, but can only calculate the Pearson correlation. {pstd} The interpretation of the correlations calculated using reshape depends on the sort of data used. E.g. if your panel units are countries, they are spatial correlations. {pstd} Any mistakes are my own. {marker examples}{...} {title:Examples} {phang}{cmd:. pwcorrf mpg weight}{p_end} {phang}{cmd:. pwcorrf mpg weight, full}{p_end} {phang}{cmd:. xtset county quarter}{p_end} {phang}{cmd:. pwcorrf gdp, reshape}{p_end} {marker results}{...} {title:Stored results} {pstd} {cmd:pwcorrf} stores the following in {cmd:r()}: {synoptset 15 tabbed}{...} {p2col 5 15 19 2: Matrices}{p_end} {synopt:{cmd:r(C)}}correlation matrix{p_end} {synopt:{cmd:r(T)}}number of joint observations per pair{p_end} {p2colreset}{...} {title:Author} Jesse Wursten Faculty of Economics and Business KU Leuven {browse "mailto:jesse.wursten@kuleuven.be":jesse.wursten@kuleuven.be}