Photon-photon Total Inelastic Cross-section *

We discuss predictions for the total inelastic γγ cross-section and their model dependence on the input parameters. We compare results from a simple extension of the Regge Pomeron exchange model as well as predictions from the eikonalized mini-jet model with recent LEP data. It is by now established that all total cross-sections, including photopro-duction, rise as the c.m. energy of the colliding particles increases. So far a successful description of total cross-sections is obtained in the Regge/Pomeron exchange model [1], in which a Regge pole and a Pomeron are exchanged and total cross-sections are seen to first decrease and subsequently rise according to the expression