{"Date":"Jan 1982","am.can":-0.0596,"m.marietta":-0.1365,"CRSP":-0.03}
{"Date":"Feb 1982","am.can":-0.17,"m.marietta":-0.0769,"CRSP":-0.0584}
{"Date":"Mar 1982","am.can":0.0276,"m.marietta":-0.0575,"CRSP":-0.0181}
{"Date":"Apr 1982","am.can":0.0058,"m.marietta":0.0526,"CRSP":0.0306}
{"Date":"May 1982","am.can":-0.0106,"m.marietta":-0.0449,"CRSP":-0.0397}
{"Date":"Jun 1982","am.can":0.045,"m.marietta":-0.0859,"CRSP":-0.0295}
{"Date":"Jul 1982","am.can":-0.0243,"m.marietta":-0.0742,"CRSP":-0.0316}
{"Date":"Aug 1982","am.can":0.1135,"m.marietta":0.6879,"CRSP":0.1176}
{"Date":"Sep 1982","am.can":-0.0331,"m.marietta":-0.077,"CRSP":0.0075}
{"Date":"Oct 1982","am.can":0.0468,"m.marietta":0.085,"CRSP":0.1098}
{"Date":"Nov 1982","am.can":-0.0223,"m.marietta":0.003,"CRSP":0.0408}
{"Date":"Dec 1982","am.can":-0.0026,"m.marietta":0.0754,"CRSP":0.0095}
{"Date":"Jan 1983","am.can":0.0166,"m.marietta":-0.0412,"CRSP":0.0301}
{"Date":"Feb 1983","am.can":0.0343,"m.marietta":-0.089,"CRSP":0.0221}
{"Date":"Mar 1983","am.can":0.0443,"m.marietta":0.2319,"CRSP":0.0269}
{"Date":"Apr 1983","am.can":0.1477,"m.marietta":0.1087,"CRSP":0.0655}
{"Date":"May 1983","am.can":0.1728,"m.marietta":0.0375,"CRSP":-0.003}
{"Date":"Jun 1983","am.can":-0.0372,"m.marietta":0.0958,"CRSP":0.0325}
{"Date":"Jul 1983","am.can":-0.0451,"m.marietta":0.0174,"CRSP":-0.0374}
{"Date":"Aug 1983","am.can":-0.0257,"m.marietta":-0.0724,"CRSP":0.0049}
{"Date":"Sep 1983","am.can":0.0509,"m.marietta":0.075,"CRSP":0.0105}
{"Date":"Oct 1983","am.can":0.0035,"m.marietta":-0.0588,"CRSP":-0.0257}
{"Date":"Nov 1983","am.can":0.1334,"m.marietta":-0.062,"CRSP":0.0186}
{"Date":"Dec 1983","am.can":-0.0458,"m.marietta":-0.0378,"CRSP":-0.0155}
{"Date":"Jan 1984","am.can":0.1199,"m.marietta":0.0169,"CRSP":-0.0165}
{"Date":"Feb 1284","am.can":-0.0766,"m.marietta":-0.0799,"CRSP":-0.044}
{"Date":"Mar 1984","am.can":-0.0511,"m.marietta":-0.0147,"CRSP":0.0094}
{"Date":"Apr 1984","am.can":-0.0194,"m.marietta":0.0106,"CRSP":-0.0028}
{"Date":"May 1984","am.can":-0.0687,"m.marietta":-0.0421,"CRSP":-0.0591}
{"Date":"Jun 1984","am.can":0.0928,"m.marietta":-0.0036,"CRSP":0.0158}
{"Date":"Jul 1984","am.can":-0.0704,"m.marietta":0.0876,"CRSP":-0.0238}
{"Date":"Aug 1984","am.can":0.0905,"m.marietta":0.1025,"CRSP":0.1031}
{"Date":"Sep 1984","am.can":0.0232,"m.marietta":-0.0499,"CRSP":-0.0065}
{"Date":"Oct 1984","am.can":-0.0054,"m.marietta":0.1953,"CRSP":-0.0067}
{"Date":"Nov 1984","am.can":0.0082,"m.marietta":-0.0714,"CRSP":-0.0167}
{"Date":"Dec 1984","am.can":0.0242,"m.marietta":0.0469,"CRSP":0.0188}
{"Date":"Jan 1985","am.can":0.0153,"m.marietta":0.1311,"CRSP":0.0733}
{"Date":"Feb 1985","am.can":0.0016,"m.marietta":0.0461,"CRSP":0.0105}
{"Date":"Mar 1985","am.can":0.028,"m.marietta":-0.0328,"CRSP":-0.007}
{"Date":"Apr 1985","am.can":0.0088,"m.marietta":-0.0096,"CRSP":-0.0099}
{"Date":"May 1985","am.can":0.0734,"m.marietta":0.1272,"CRSP":0.0521}
{"Date":"Jun 1985","am.can":0.0315,"m.marietta":-0.0077,"CRSP":0.0117}
{"Date":"Jul 1985","am.can":-0.0276,"m.marietta":0.0165,"CRSP":-0.0099}
{"Date":"Aug 1985","am.can":0.0162,"m.marietta":-0.015,"CRSP":-0.0102}
{"Date":"Sep 1985","am.can":-0.0975,"m.marietta":-0.1479,"CRSP":-0.0428}
{"Date":"Oct 1985","am.can":0.0563,"m.marietta":-0.0065,"CRSP":0.0376}
{"Date":"Nov 1985","am.can":0.1368,"m.marietta":0.039,"CRSP":0.0628}
{"Date":"Dec 1985","am.can":-0.069,"m.marietta":0.0223,"CRSP":0.0391}
{"Date":"Jan 1986","am.can":0.1044,"m.marietta":-0.069,"CRSP":0.0002}
{"Date":"Feb 1986","am.can":0.1636,"m.marietta":0.1338,"CRSP":0.0688}
{"Date":"Mar 1986","am.can":-0.019,"m.marietta":0.1458,"CRSP":0.0486}
{"Date":"Apr 1986","am.can":-0.0746,"m.marietta":0.0063,"CRSP":-0.0174}
{"Date":"May 1986","am.can":0.0433,"m.marietta":0.0692,"CRSP":0.046}
{"Date":"Jun 1986","am.can":0.0306,"m.marietta":-0.0239,"CRSP":0.01}
{"Date":"Jul 1986","am.can":0.0636,"m.marietta":-0.0568,"CRSP":-0.0594}
{"Date":"Aug 1986","am.can":0.0917,"m.marietta":0.0814,"CRSP":0.068}
{"Date":"Sep 1986","am.can":-0.0796,"m.marietta":-0.0889,"CRSP":-0.0839}
{"Date":"Oct 1986","am.can":0.0778,"m.marietta":-0.0887,"CRSP":0.0481}
{"Date":"Nov 1986","am.can":-0.0353,"m.marietta":0.1037,"CRSP":0.0136}
{"Date":"Dec 1986","am.can":-0.0137,"m.marietta":-0.1163,"CRSP":-0.0322}