You may wish to read these two articles:

1) Galetto and Marginson (2011) where the NPM established more independent public sector providers, particularly in the health sector, for instance turning English NHS hospitals into Foundation Trusts at arm's length from direct government control: https://www2.warwick.ac.uk/fac/soc/wbs/research/irru/wpir/gusto_papers/gust_wp6_4.pdf

2) Bossert et al. (2003) where performance improvements by service providers in Zambia have been rewarded with greater freedom from government control. DOI: 10.1093/heapol/czg044.

Hope they are of help.

Dear Nasrul, thank you for providing the 2 artcles.

Kind regards

Neale

From Old Public Administration to the New Public Service: Implications for Public Sector Reform in Developing Countries

http://www.undp.org/content/dam/undp/library/capacity-development/English/Singapore%20Centre/PS-Reform_Paper.pdf

Kuipers, B.S., Higgs, M.J., Kickert, W.J.M., Tummers, L.G., Grandia, J., Van der Voet, J.

(Forthcoming). The management of change in public organisations: A literature review. Public Administration

http://www.adaptivecycle.nl/images/The_management_of_change_in_public_organizations.pdf

Public Sector Leadership: International Challenges and Perspectives

geredigeerd door Jeffrey A. Raffel,Peter Leisink,Anthony E. Middlebrooks

https://books.google.nl/books?id=yYljZSpL68gC&pg=PA18&lpg=PA18&dq=directions+succes+NPM+change+public+sector&source=bl&ots=I3leE7qBRc&sig=EoFCwuIN8-VD4Mcmr9g92YPzZ5s&hl=nl&sa=X&ved=0ahUKEwjIqLKCvIvNAhWKCsAKHXmyBCkQ6AEIKDAA#v=onepage&q=directions%20succes%20NPM%20change%20public%20sector&f=false

Dear Gerard,

Thank you greatly for providing some interesting publications.

Kind regards

Neale

Work by  Guy Peeters, Frits van der Meer and Christopher Pollitt could help you along.