-You posted this on another thread:"Mike, Jay, like both of you, I buy based on Internal Rate of Return (IRR) Analysis, not on calculations that only tell you what the current year return gives you.I met a few BP members recently and showed them how large the Returns are and it's quite shocking.

I like to be informed of the long run of the market before jumping in, and I hope to bring that philosophy into real estate.How granular can the data get, say for the metropolitan area level, for metrics such as inflation-adjusted rent (for 1 br?

A few months ago, at the Environmental Information Association convention in San Diego, we met a man from Home Depot looking for consultants to help with asbestos, mold, and lead.  

They use various algorithms and public data which vary wildly.

You need data showing the difference on relatively large sample say N=10 per sf.You may make tenants happier that someone is not ripping other off.

What is the most efficient way to get this data?

It's still quite affordable for multifamily investors, the commute is easy, and the area has been appreciating over time, besides being very family-oriented.I'm a data-driven kind of broker, and I find this graphic from Bloomberg to be extremely helpful: https://www.bloomberg.com/graphics/property-prices...Also, make sure to always check NYC's crime map: https://maps.nyc.gov/crime/ You can also see crime rates on Trulia and will soon realize that many listings for sale are on "hot spots" on those maps, so be mindful of that.I would also strongly advise you to find a good broker in order to assist you in the transaction: it may give you a clear advantage over other investors as they will know how to put you in the best position when presenting an offer and may be also aware of off-market deals. 

I'm sure this made a huge impact for everyone that was able to attend.I am new in real estate investing but met a guy who is 2 years into house flipping.

The actuary uses claim data to determine risk.

Propstream, like any other data provider or software, is a computer program that uses and 'interprets' data to help users build lists.