We report Nernst effect data for crystalline films of Y0:95Ca0:05Ba2ðCu1 xZnxÞ3Oy (with x ¼ 0, 0.02,
and 0.04) and Y0:9Ca0:1Ba2Cu3Oy grown by pulsed laser deposition. We show that our own results and
published data for LSCO are consistent with the theory of Gaussian superconducting fluctuations. We also
show that Zn doping increases the Nernst coefficient simply because it reduces the in-plane conductivit
