The Jerome model is part of the econometric models component of the combined PollyVote forecast. It currently forecasts a two-party vote share of 38.4% for Clinton and 0.0% for Trump in Massachusetts. In comparison, on August 4, Clinton was predicted to win 61.6% of the vote.
Putting the results in context
As any other method, econometric models are subject to bias. In general, don't focus too much on the results of a single econometric model. Rather than trusting the results from single econometric models, you should rely on combined econometric models or, even better, the combined PollyVote forecast that includes forecasts from different methods, each of which draws upon different data.
Results compared to other econometric models
When compared to the average results of other econometric models Clinton performed better with 0.0 percentage points, while Trump did worse with 0.0 percentage points.