https://charlescoverdale.r-universe.dev/ivcheckhttps://charlescoverdale.r-universe.dev/api/packages/ivcheckhttps://charlescoverdale.r-universe.dev/ivcheck/ivcheck.pdfhttps://charlescoverdale.r-universe.dev/ivcheck/doc/manual.htmlhttps://charlescoverdale.r-universe.dev/ivcheck/NEWShttps://charlescoverdale.r-universe.dev/ivcheck/NEWS.txthttps://charlescoverdale.r-universe.dev/ivcheck/citationhttps://charlescoverdale.r-universe.dev/ivcheck/citation.txthttps://charlescoverdale.r-universe.dev/ivcheck/citation.cffhttps://charlescoverdale.r-universe.dev/ivcheck/doc/getting-started.Rmdhttps://charlescoverdale.r-universe.dev/articles/ivcheck/getting-started.htmlhttps://charlescoverdale.r-universe.dev/ivcheck/doc/judge-designs.Rmdhttps://charlescoverdale.r-universe.dev/articles/ivcheck/judge-designs.htmlhttps://charlescoverdale.r-universe.dev/ivcheck/doc/with-fixest.Rmdhttps://charlescoverdale.r-universe.dev/articles/ivcheck/with-fixest.html