I?m looking for articles, surveys, studies, citations, etc. that
provide insight into onsite employee services and benefits.  Onsite
employee services are services that are brought to employees that they
can access while they work.  For example, an onsite car wash service
would wash your car while you are at work.

For questions 1, 2, 3, 4 below, I?m interested in the following
services, in priority order:

First -  Car washing and detailing

Second ? Oil change, dry cleaning, dental, medical, food service, dent
repair, windshield repair, childcare, massage, haircut, concierge,
health club/workout facility, campus general store, bicycle repair,
onsite travel, Employee Assistance Program (EAP)

Third ? Atm, vending machines, packing/shipping station

1)  How many companies (# or %) in (first) the San Francisco/Silicon
Valley/Bay Area of California, and (second) anywhere in the US, offer
employees access to onsite services.

2)  How many employees at an average corporate campus would like to
have access to these services?  How many think that someone at their
company could use a service like this?  How often would they use
services like this?

3)  How much time does the average person spend in a month (or week,
or year, or other measurement of time) on these types of services?
 
4)  Whether onsite services (especially onsite car washing) enhance
moral, save time, or increase corporate productivity.  Anything that
cites or shows specific numbers would be ideal.



5)   How have corporate benefits changed over time?  I.e. how have
employee Health Care, 401k, and other benefit programs grown in
adoption over time.  How have Employee Assistance Programs (EAPs)
recently grown?  How quickly?  Where?

6)  How much productivity and increased moral do Employee Assistance
Programs (EAPs) create?


Criteria for a answers:
I am ideally looking for articles, studies, survey etc. that are both
qualitative and quantitative.  i.e They make claims like ?Onsite
employee services increase productivity? and also back that claim up
with numbers.  I?m most interested, however, in the quantitative
information ? numbers, %?s, charts, etc.