Does it make sense to get a PhD if I have a Candidate of Sciences degree from a post-soviet country Candidate of Sciences degree is awarded in some post-soviet countries for completing a 3-5 year research program, which has similar scientific requirements as a PhD. Here is a wikipedia article about it: https://en.wikipedia.org/wiki/Candidate_of_Sciences

Does it make sense to go after a PhD in a European or American university after obtaining a Candidate of Sciences degree? Would a university consider enrolling a Candidate of Sciences in a PhD program? Would it be possible to apply for scholarship for it? Would an age make any difference? 

Also, if I am switching fields and do not intend to work in the field, in which I did my Candidate of Sciences thesis, would it make sense to get a PhD in the field I plan to work in?

I spent some time trying to find an opportunity to get a PhD on top of my Candidate of Sciences degree, but had no success and gave up. I have plenty of job opportunities as a Candidate of Sciences, but I wonder if I will have more and better jobs available to me if I get a PhD from a western university as well.

I am leaning towards a conclusion that having good publications is much more important than getting a shinier degree. If this is the case, then doing a PhD would only make sense if it resulted in some good research results. But then isn't it better to look for post-doc positions that are solely focused on producing good research results and publications?

Edit: Some specific information about my situation.

My Candidate of Sciences thesis and publications are in agricultural economics. The field in which I would like to apply for either PhD or post-doc is behavioral economics. Behavioral economics has a fair share of psychology and decision sciences in it and its research methods differ so I still have quite a bit of books to read.

I do not have publications in highly ranked journals. I have two publications in agricultural economics: one in AGRIS on-line Papers in Economics and Informatics and the other one in Studies in Agricultural Economics. I also have a forthcoming publication in behavioral economics in The International Journal of Economic Behavior. These journals are not high ranked at all, but they do appear in some rankings.

I am the only author in all of my publications in ranked journals. 

My English is good.

I'm about to hit 30.
Does it make sense to go after a PhD...


To whom?


For someone who has published a couple of papers in Science or Nature as the first author during their aspirantura period, the answer is no &mdash; they should apply directly for a permanent post or a prestigious named Fellowship, and develop their research.
For someone who has published several papers in top international journals, and at least one without their supervisor, the answer is probably no again &mdash; they should go for a postdoc or research fellow route.
For someone who did not publish much (or did not publish in international journals), who may struggle with English a bit, and/or not quite on top of the methods and hot topics in their research area, the answer may be yes. Having a PhD from a well-known university definitely improves the position on a competitive academic job market. More importantly, it can provide you with a set of soft skills (networking, presentations, etc) which many post-Soviet institutions are not very strong at sometimes.