Major merger fraction as a function of redshift. The dots are from present work for M _⋆  ≥ 10¹¹  M_⊙ galaxies from 10   h^-1 kpc kpc close pairs. The triangles are from Kartaltepe et al. (2007) in the COSMOS field for M_V ≤  − 19.8 galaxies from 5   h^-1 kpc kpc close pairs. The stars are from Bridge et al. (2010) in the CFHTLS by morphological criteria for M _⋆  ≳ 5 × 10¹⁰  M_⊙ galaxies, and crosses are from Jogee et al. (2009) for M _⋆  ≥ 2.5 × 10¹⁰  M_⊙ galaxies by morphological criteria in GEMS (upward arrows mark those points that are lower limits). The dashed line is the least-squares best fit of a power-law function, f_MM ∝ (1 + z)^1.4, to the major merger fraction data in the present work. The dotted line is the evolution from Kartaltepe et al. (2007), f_MM ∝ (1 + z)^2.8.