  We measure the stellar populations as a function of radius for 90 early-type
galaxies (ETGs) in the MASSIVE survey, a volume-limited integral-field
spectroscopic (IFS) galaxy survey targeting all northern-sky ETGs with absolute
K-band magnitude M_K < -25.3 mag, or stellar mass M* 4x10^11 M_sun, within 108
Mpc. We are able to measure reliable stellar population parameters for
individual galaxies out to 10-20 kpc (1-3 R_e) depending on the galaxy.
Focusing on ~R_e (~10 kpc), we find significant correlations between the
abundance ratios, sigma, and M* at large radius, but we also find that the
abundance ratios saturate in the highest-mass bin. We see a strong correlation
between the kurtosis of the line of sight velocity distribution (h4) and the
stellar population parameters beyond R_e. Galaxies with higher radial
anisotropy appear to be older, with metal-poorer stars and enhanced [alpha/Fe].
We suggest that the higher radial anisotropy may derive from more accretion of
small satellites. Finally, we see some evidence for correlations between
environmental metrics (measured locally and on >5 Mpc scales) and the stellar
populations, as expected if satellites are quenched earlier in denser
environments.
