Should I stay or should I go now? The postdoc mobility myth

Britpop, an automatic association with the early 90s – but the bar has been raised for postdocs since then. Credit: Danny PiG/Flickr.

Far back in the mists of time, in the great and glorious days of Britpop, Forrest Gump, and John Major’s “Back to Basics”, I was a postdoc[1]. It was my first postdoctoral position after completing my PhD at Dublin City University in late 1993 and I loved the research I was doing, the working environment, and the camaraderie and teamwork of the Nottingham group.

But I hated the underlying volatility of the post.

After completing a two-year postdoc, I was funded by consecutive short-term contracts. At any time the funding stream could have dried up, and I would have had to move on. I got lucky: I secured a permanent lectureship post after three years at Nottingham and I’ve stayed there ever since – the School of Physics and Astronomy is a fantastic place to work.

I know for a fact, however, that the research ‘outputs’ I had in 1997 – enough for a lectureship at the time – wouldn’t get me within sniffing distance of a shortlist today. The bar has been raised dramatically for postdocs over the intervening years. Increasingly, the route to a permanent academic position involves first winning a fellowship through a highly competitive process.

One of the factors which is very often taken into consideration when selecting for both fellowship and lectureship positions is the “mobility” of the candidate. Indeed, the Leverhulme Trust now explicitly states in its advice to applicants that mobility is a key criterion: “Priority will be given to applicants who show evidence of mobility during their academic careers to date.”

The blunt statement that mobility will be used as a criterion in selecting fellows – with no attempt to qualify this in terms of the personal circumstances of the applicant – reveals some worryingly simplistic and out-dated thinking from the Trust. They are not alone, of course, in assuming that mobility must necessarily be an advantage for a researcher, as this recent article points out in the context of EU funding programmes. The arguments about mobility in that piece resonated with me because I coordinate a Marie Curie Initial Training Network (ITN) project which funds 14 early-career researchers across six countries. Researcher mobility for ITN projects is not only advantageous from the point of view of the European Commission, it’s essential – I can’t employ a UK national on a Marie Curie ITN contract in Nottingham. (Can someone please make sure that this nugget of EU funding policy wings its way to Nigel Farage? I want to watch him spontaneously self-combust…)

The argument that is often made – and which was voiced during a lengthy twitter debate with my Head of School[2] and others on this topic yesterday – is that a postdoc, let’s say Dr. Globetrotter, who has moved from group to group is likely to have greater drive, motivation, and scientific independence than her colleague, Dr. Stayen-Putt, who has remained at the same institution throughout her undergrad, postgrad, and postdoctoral career.

I really don’t buy this argument at all.

Skewing the selection process towards candidates who are willing to ‘up sticks’ and move to a new group every few years immediately disadvantages – and, at worst, discriminates against – those whose personal circumstances and family commitments mean that they do not have the freedom to move. I, for one, would not have been willing to disrupt my children’s lives on a regular basis simply so I could demonstrate a commitment to mobility to a fellowship panel. And I find it rather insulting that this could have been interpreted as a lack of scientific drive, motivation, and independence.

The assumption that scientific independence correlates positively with mobility also needs to be challenged. There is no evidence at all that a postdoc who has been in the same institution for their entire career is any less scientifically independent, or any less scientifically motivated, than a researcher who clocks up the air miles. Indeed, I can think of reasons why there could be a negative correlation between mobility and scientific independence – it takes considerable time to establish oneself at a new institution, to learn to interact with a new group of colleagues, and to work out how you can carve out a niche to “make a mark”.

Moreover, there’s a rather straightforward, pragmatic reason why mobility may not be conducive to establishing scientific independence. Experimental physics is not easy – the ‘kit’ is often complicated and frustratingly temperamental (particularly for non-commercial systems which the researcher has built themselves). If the experimental infrastructure in an institution is very well-matched to a researcher’s scientific goals it would be perverse for them to move simply so that they can tick the mobility box.

And finally, the wonders of the interwebs mean that researchers are connected like never before. In this context, the Leverhulme Trust’s focus on mobility as a criterion in awarding fellowships is particularly quaint, given the extent to which research groups now network and interact virtually.

[1] …and a Douglas Adams fan.

[2] My P45 is in the post.


Philip Moriarty

Philip Moriarty

Philip Moriarty is a Professor of Physics at the University of Nottingham. His research interests lie in what has occasionally been described as “extreme nanotech” in that he works alongside a talented bunch of nanoscientists to prod, poke, push, pick, and pull individual atoms and molecules in order to explore forces and interactions down to the single chemical bond limit. Moriarty also has a keen and long-standing interest in science communication and public engagement. He is a member of the Sixty Symbols team that was awarded the Institute of Physics Kelvin prize in 2016 for “innovative and effective promotion of the public understanding of physics”. While he doesn't share his infamous namesake's fascination with the binomial theorem, Moriarty enjoys exploring the maths-music-physics interface including, in particular, the deep and fundamental links that exist between quantum mechanics and heavy metal music (a theme discussed at length in his book, “When the Uncertainty Principle Goes to 11”). He blogs at
Philip Moriarty

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