<p>SwatGrad,</p>
<p>Keil used “me” correctly. “Than” is both a subordinating conjunction and a preposition. When "than: is used as a subordinating conjuction it would be “I.” When used as preposition, it would be “me.”</p>
<p>Than as a subordinating conjuction: He is older than I am.</p>
<p>Than as a preposition: He is older than me.</p>
<p>How to tell if it is correct? When in doubt, switch to the plural. We would not say: He is older than “we.” </p>
<p>Sorry, but this is a pet peeve of mine! LOL!!!</p>