What are four factors that encourage development and wealth creation?

I don't think all economists would agree on the same four factors.

And anyway, who says there are four factors, or twelve or only two,

to keep to the main favorable factors ?. And the same number of

unfavorable ones to avoid?

Let us say

* education and training

* positive attitude towards knowledge, science and innovation.

* market freedom and free initiative,

* but an authority to avoid dishonesty and excesses, remember

the subprime.scam,

* Investment, investment, investment ! Private mostly, but also by

public authorities (see below : infrastructures)

* adequate laws (for example to protect contracts) and legal institutions,

* reasonable taxes, leaving people to use freely the bulk of their wealth

and incomes

* internal and external safety,

* adequate infrastructures (roads, water, energy...),

* protected environment,

* adequate care for health and poverty.

That makes much more than,four. Up to you to choose among them

...or explore others. Seems you did not invent this reductive question

and it is your homework,

See also : factors of production and of economic value

http://pgreenfinch.pagesperso-orange.fr/recupknol/...