[image]
 
The coefficient of determination is .384 and the only significant parameter estimate is for population density (-.4744, p < .05).  This echoes the results of the prior model. 
 
Conclusions and Discussion
 
My analysis does not yield any conclusive results with respect to the impact of certain socioeconomic factors on accessibility to healthy food venues.  I suspect that the issue lies within the Yelp sampling.  The stark similarity between average minimum distance choropleths in Fig. 4 suggest that the Yelp data is heavily biased by propensity to review in each PUMA zone.  The same PUMA zones exhibit high and low values for average minimum distance to a venue whether it is healthy or not; this suggests that the Yelp data is largely a reflection of which PUMA’s are more likely to review their local businesses and cannot be explained by the socioeconomic parameters in the model.
[explain results]
[interpretation]
Future Work
 
Future exploration would include the acquisition of an unbiased sample of restaurants and grocers so that the analysis might yield significant results
 
Bibliography
Hilmers A, Hilmers DC, Dave J. Neighborhood disparities in access to healthy foods and their effects on environmental justice. Am J Public Health. 2012;102(9):1644-54.
 
Data Sources
Yelp Fusion API:
https://www.yelp.com/fusion
 
NYC Open Data (Farmers’ Markets):
https://data.cityofnewyork.us/api/views/8vwk-6iz2/rows.csv?accessType=DOWNLOAD
 
NYC Open Data (Recognized Shop Healthy Stores):
https://data.cityofnewyork.us/api/views/ud4g-9x9z/rows.csv?accessType=DOWNLOAD
 
 
[1] Hilmers A, Hilmers DC, Dave J. Neighborhood disparities in access to healthy foods and their effects on environmental justice. Am J Public Health. 2012;102(9):1644-54.
[2] Hilmers A, Hilmers DC, Dave J. Neighborhood disparities in access to healthy foods and their effects on environmental justice. Am J Public Health. 2012;102(9):1644-54.
[3] Staten Island is excluded because of its unique modal character with respect to transportation.  It lacks much of the public transportation that other boroughs enjoy and its residents rely more heavily on cars.
[4] Please note that I am not generalizing Chinese food as unhealthy.  “china” and “chinese” were included as unhealthy flags because takeout-style Chinese restaurants are prevalent in NYC (often in low income neighborhoods) and are often considered unhealthy