  In this note we address the issue of theoretical estimates of the hadronic
cross-sections for \gamgam processes. We compare the predictions of the minijet
model with data as well as other models, highlighting the band of uncertainties
in the theoretical predictions as well as those in the final values of the
$\sigma (\gamgam \go {\rm hadrons})$ extracted from the data. We find that the
rise of $\sigma_{\gamma \gamma}^{\rm tot}$ with energy shown in the latest
\gamgam data is in tune with the faster rise expected in the Eikonal Minijet
Models (EMM). We present an estimate of the accuracy with which this
cross-section needs to be measured, in order to distinguish between the
different theoretical models which try to `explain ' the rise of total
cross-sections with energy. We find that the precision of measurement required
to distinguish the EMM type models from the proton-like models, for $300 <
\sqrt{s}_{\gamgam} < 500$ GeV, is $\lsim 20 %$, whereas to distinguish between
various proton-like models or among the different parametrizations of the EMM,
a precision of $\lsim 8-9 %$ or $\lsim 6-7%$ respectively, is required. We also
comment briefly on the implications of these predictions for hadronic
backgrounds at the next linear collider (NLC) to be run in the \gamgam mode or
\eplem mode.
