The Gide article is in the EJ, VIII, 32 (December 1898), 490-511; the word "Neo-liberal" is on p. 494.
Ngram indicates a first usage around 1806-07, but I can't figure out how to get the text on the screen.
Remember, however, this is ONLY English. I have no idea who was more prone to neo-logizing, English, French, German, Italian, Spanish, Portuguese, Russian, or others interested in "economics." 

-----Original Message-----
From: Societies for the History of Economics [mailto:[log in to unmask]] On Behalf Of Nicholas Theocarakis
Sent: Monday, December 30, 2013 8:42 PM
To: [log in to unmask]
Subject: Re: [SHOE] History of the term "neo-liberal"

Google Philip Mirowski Postface Defining Neoliberalism.  
There is an EJ article translated from the French by Charles Gide on Maffeo Pantaleoni. OED mentions this article as the first instance of neoliberalism and neoliberal in English. 

Sent from my iPhone

> On 30 Δεκ 2013, at 1:40 μ.μ., Robert Leeson <[log in to unmask]> wrote:
> 
> In his JPE review of Die Konkurrenz Untersuchungen über die Ordnungsprinzipien und Entwicklungstendenzen der Kapitalistischen Verkehrswirtschaft by Georg Halm, Arthur R. Burns (1930, 490) states that Halm is a member of the "neo-liberal school of Professor Adolf Weber, of Munich". I would be grateful for references to earlier uses of the term.
> 
> RL