<p>Why is "In those cities in which blah blah" correct? Wouldn't it be "where" instead of "in which"?</p>
<p>bump 10char</p>
<p>it depends on the meaning of the sentence</p>
<p>‘in which’ is specific to the cities in mind
‘where’ is specific to cities in general</p>
<p>“I used to live in the cities in which there are high crime rates” refers only to those with high crime rates
“I used to live in cities…where there are high crime rates” refers to the fact that cities typically have high crime rates</p>
<p>so since the sentence starts off specifically with “in those cities,” “in which” should follow</p>