I work in production.
So I only know what Marketing tells me (It's based on Margketing Logic, so do with that what you will).
A lot of effort goes into determining the price.
Cost (Production, my area).
Competition (WW, Green Ronin).
Audience (Where Marketing Logic comes in).
Marketing has decided to keep the Price of the DMG & PHB the same (for some reason). It seems the only way production could do that is lower costs (less page count).
Are they doing it because they think (sorry, researched) that Roleplayers think that the Core Books should all have the same price (& won't notice the DMG is thinner)?
Are they willing to take less profit on the PHB as they think (Research. I mean Research) as that will lead to a bigger D&D Audience and greater sales down the road?
Did they use a Ouija board, or used a Haitian Voodoo Witch Doctor to set the price? (I wonder sometimes about marketing).
Marketing used all that BS, MS, and Other Collegiate Marketing Training to determine what the best price for the 4th ed core books.
Or used a Dart Board (They've tried to explain the Logic of Marketing to me, it still sounds like a much of mumbo-jumbo, mis-used statistics & a rough shot in the dark to me).
Alos. I like coffee.
But Caffeine after 3 PM causes me 3-6 hours of insomnia. Thus I drink De-Caff.
Which Sucks. You see de-leading Coffee is expensive. In order to keep de-caff the same as Regular, they have to use cheaper beans. Thus the old sock taste.
However, if you find a quality supplier & are willing to pay more, you can get Decaf that tastes every bit as good, & won't keep you up at night.
However, Marketing Logic ditactes that People won't pay more for Decaf, so you have to have it taste like sweat-socks to have the same profits.
Marketing also states that fewer people buy decaf.
IMPORTANT NOTE: Although many people don't buy decaf due to the inferior taste, Marketing has determined that has nothing to do with why fewer people buy decaf.
After all, if it cost more, but tasted the same, fewer people would buy it. Which is completely different than saying fewer people buy it because it costs the same but has inferior taste.