Shelter costs were up 1.2 percent, with a 1.4 percent rise for residential rents.
Supermarket and restaurant food, residential rent and health care have all become more expensive in each of the last three months, according to government statistics.
Mr. Lander's solution is to make sure that residential rents remain affordable.
Over all, residential rents rose 1 percent, but renters' total costs, including utilities, increased by 2.5 percent.
"Office rents have moved quickly to close the huge gap that existed with residential rents."
It has hastened the gentrification of the neighborhood, she said, where residential rents have increased steeply over the last decade.
Since the referendum, residential rents have risen substantially, as has investor interest in Cambridge.
The rise in residential rents was the principal reason in this instance.
Much of the interest is driven by escalating residential and commercial rents in Manhattan.
But these cost-of-living listings are heavily influenced by residential rents and have little to do with the cost of a meal in a noodle shop.