Books that set their own lines

[spell]

So, I was comparing the overnight lines in NBA, MLB, and NHL between Pinny and BetIslands.

I found that the vigs for the Run Line, Puck Line, Spread, and Money Line faves were all exactly the same between the two sites. (The vigs for the dogs were obviously worse than Pinny, since Islands spreads lines with more vig than Pinny does.) The vigs on the totals differed some, but the vigs for the lines mentioned above were identical to the cent.

My question is this: How many books actually make their own lines, and how many copy (to whatever degree) another book (Cris, Pinny, whatever)?

Furthermore, and this may not be the proper forum for this question, if Islands is copying Pinny's lines (and it remains to be seen if Islands is just copying openers or is just cloning Pinny all the time), is that one of the reasons they moved to their own facility? I know they were with Jazz before, so it would make sense that now they're "setting their own lines" by just copying Pinny.

[JohnRingo]

LVSC and

CRIS set the lines as far as Im concerned. Everyone else just follows suit. Lines are set by public perception.

[LT Profits]

If you like EXPLOITABLE homemade lines, check out Heritage advance NBA lines the days before the games, usually up by 1:00 ET.

[Masu485]

I've seen Betonline and a couple of others have lines up before BM and Greek. These lines are often inaccurate. They seem to change to conform with the rest of the board when they open lines. I don't know if this is due to them changing it manually, or if they get bet down quickly. Probably the former.

[rm18]

I've seen Betonline and a couple of others have lines up before BM and Greek. These lines are often inaccurate. They seem to change to conform with the rest of the board when they open lines. I don't know if this is due to them changing it manually, or if they get bet down quickly. Probably the former.

they put up vegas numbers I think as opposed to making them up