Search for variability in Newton's constant using local gravitational
  acceleration measurements
  In a recent work, Dai (arXiv:2103.11157) searched for a variability in
Newton's constant $G$ using the IGETS based gravitational acceleration
measurements. However, this analysis, obtained from $\chi^2$ minimization, did
not incorporate the errors in the gravitational acceleration measurements. We
carry out a similar search with one major improvement, wherein we incorporate
these aforementioned errors. To model any possible variation in the
gravitational acceleration, we fit the data to four models: a constant value,
two sinusoidal models, and finally, a linear model for the variation of
gravitational acceleration. We find that none of the four models provides a
good fit to the data, showing that there is no evidence for a periodicity or a
linear temporal variation in the acceleration measurements. We then redid these
analyses after accounting for an unknown intrinsic scatter. After this, we find
that although a constant model is still favored over the sinusoidal models, the
linear variation for $G$ is marginally preferred over a constant value, using
information theory-based methods.
