See Dr. Jeannie Haggerty's new editorial in the British Medical Journal based on this very interesting publication on Primary Care Systems published in the Health Affairs.
Haggerty, J., Lévesque J-F., Hogg W. & Wong S. The strength of primary care systems. Stronger systems improve population health but require higher levels of spending. BMJ, 2013; 346; f3777 doi: 10.1136/bmj.f3777.
This editorial by Dr. Haggerty is based on the article by Kringos D., Boerma W., van der Zee J., & Groenewegen P entitled: Europe's Strong Primary Care Systems Are Linked To Better Population Health But Also To Higher Health Spending. Health Affairs, 32, no.4 (2013):686-694. You can read the article here.