Industrious synergy

[craigruff]

Here is a question from a beginner. I am playing Civ 4. I see that by choosing the Industrious trait I receive 50% build speed on wonders. What effect does having stone and marble have then? Also what effect does Bureaucracy with its 50% production have if I am building a wonder in that city? Furthermore, what effect does Organized Religion have with its 25% building and wonder construction?

 

[ParadigmShifter]

All the bonuses add up. So if you have stone (and it speeds up the production of the wonder +100%) and are industrious you get +150% total. Similarly for forges, organised religion, bureaucracy, factories, etc.

 

[BeefontheBone]

... except that some are applied as reductions in cost, others as increases in production. No idea why.

 

[Antilogic]

What?

All the things in the OP are additive bonuses. So, you just add up the percents, and then apply the final result all at once. Not one of them (that I've noticed) is implemented as a reduction in cost.