Dear John & Doves:
I can certainly sympathize with Math Man's statement: "I have not seen any really rigorous quantitative analysis...." regarding the Tribulation period. I must plead guilty. My first time line analysis contained a bias and was ultimately wrong. Although the following probably did not originate with Steve Coerper he was the first one I heard use it. He said "torture the data and it will admit to anything." I tortured the data and it admitted to a 2010 - 2017 Tribulation period. For this I apologize.
The bias I soon learned was "I want the rapture now so I will construct a time-line analysis that conforms to my wishes." So where is the objectivity in that? This could be relevant to the current situation. Even if we allow for 2520 days instead of 2550 days for a 2011 -2018 No Gap theory Tribulation period that scenario is about to expire. So then what, do we champion a shortened Tribulation period, say 2300 days?
I think the only way to achieve a "rigorous quantitative analysis" is to use Biblical data elements and let the chips fall where they may. Following is a list I compiled that may or may not be exhaustive. Even if an analysis contains all these essential data elements it could still be flawed.
Revelation 11:3 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.
Revelation 11:11-12 And after three days and an half the Spirit of life from God entered into them, and they stood upon their feet; and great fear fell upon them which saw them. And they heard a great voice from heaven saying unto them, Come up hither. And they ascended up to heaven in a cloud; and their enemies beheld them.
Revelation 12:6 And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days.
Daniel 8:13-14 Then I heard one saint speaking, and another saint said unto that certain saint which spake, How long shall be the vision concerning the daily sacrifice, and the transgression of desolation, to give both the sanctuary and the host to be trodden under foot? And he said unto me, Unto two thousand and three hundred days; then shall the sanctuary be cleansed.
Daniel 12:11 And from the time that the daily sacrifice shall be taken away, and the abomination that maketh desolate set up, there shall be a thousand two hundred and ninety days.
Daniel 12:12 Blessed is he that waiteth, and cometh to the thousand three hundred and five and thirty days.