This is an article from one of the foremost Irish Economists, Colm McCarthy.
I think I'm restricted in the amount of the article I can post here but there's a free signup for anyone interested below
May can still avoid Brexit train wreck - but she will have to take a new line
The EU-27 won't call the UK's bluff despite its negotiating stance bordering on fantasy
'What the hell does your government think it's doing?" a former Conservative minister asked the Irish Times' London correspondent, Denis Staunton, last week. "Do they not know the pressure she'll come under to just walk away?" The UK Prime Minister Theresa May has already capitulated to pressure from the ultra Brexiteers in her party and has chosen a costly and disruptive route to departure from the European Union. These post-referendum choices are the source of the difficulties over the Irish border and of the bewilderment in Europe about the UK government's negotiating objectives revealed in the leaked memo from the Irish foreign affairs department last week.
The British electorate chose to depart the EU but it is the British government that has chosen to implement this decision in a manner that has created the stand-off with Europe, concerns about Britain's longer-term economic prospects and conflict over the Irish border.
SNIP
Nigel Dodds, the Democratic Unionist Party's deputy leader, told a BBC interviewer last week that he favoured a walk-away position for the UK in the upcoming negotiations on the withdrawal deal. No deal is better than a bad deal according to Dodds, at least as a negotiating tactic, in line with the position expounded regularly by bravura Brexiteers in London. But bluffing in negotiations does not work if your counterparty knows for sure that your stated preference is a bluff. And a no-deal outcome for the UK, including Northern Ireland, would be a chaotic train wreck, as the bravura Brexiteers must surely understand. Michel Barnier and his EU-27 negotiating team regard the no-deal preference as nonsensical and have been ignoring the bluffers.
Neither Northern Ireland nor the Republic should welcome a hard border down the Irish Sea: as Dodds quite correctly pointed out, NI does far more trade with mainland Britain than it does with the Republic, and he must know that the same is true for the Republic.
Speaking later to Sky News, Dodds had this to say about the position of the Irish government: "Their real aim is to try to get to a situation where either they try to force the United Kingdom as a whole to stay within the customs union, which is in their interests clearly. Or, if they fail that, to at least force Northern Ireland to stay within the customs union and the single market…"
The DUP chose to campaign for Britain's departure from the EU, as was its entitlement. But the DUP has yet to explain why the form of departure chosen by May and her colleagues is in Northern Ireland's interests. Why would it be a bad outcome for Northern Ireland if the UK (all of it) left the EU but stayed in the single market and customs union, Varadkar's preference, minimising economic damage and preserving an open border?
https://www.independent.ie/opinion/columnists/colm-mccarthy/may-can-still-avoid-brexit-train-wreck-but-she-will-have-to-take-a-new-line-36353480.html