Fig.8 Rent Burden and Income Integration level, 1990-2000-2010; observations + fitted linear regression model line for all years
Rent Burden over Income Integration level (entropy index)
The linear regression models did not seem to describe / predict the data sufficiently, and in accordance their R-squared are low. The differences between the years are interesting: First, neighborhoods become more integrated by income, though the trend is polarized as the rich becoming more segregated. Secondly, the correlation, although not significant, changed its direction; from a negative correlation to a positive correlation, which means that in 1990 the more integrated a neighborhood was the lower was its rent burden; though in 2010, the more integrated the higher the rent burden is.
That change depicts the gentrification process and the consistently deepening economic gap. With the majority of neighborhoods in the higher side of the integration level, more neighborhoods cross the line of 30% rent burden.
From there we need to look up income integration and income level. How NYC is diversified by income
Fig.9-11 Income VS Income Integration level with linear regression, 1990, 2000, and 2010