this week in the third segment of the korelin economics report, laurence roulston provided a basic primer on mining. he discussed the requirements of canada's national instrument 43-101, and the difference between different categories of resources, i.e inferred vs. measured and indicated.
he also mentioned that institutional investors normally only invest in companies that have proved up reserves, so those sell at much higher premiums. these higher valutations imply that the greatest potential for growth comes when a company can move resources (which need not be economic) into the reserve category.
silver standard has already done this at the pirquitas project, but the stock has not yet received a higher valuation for it. if you skipped geology class, this broadcast is worth listening to.
http://www.kereport.com/