If Trump Loses The Election, Will He Concede?

There's been a lot of speculation regarding what Trump might or might not do in the event that he loses his re-election bid, particularly if it's a close election. There are some very good reasons why one might suspect that he would fail to accept or de-legitimize an election night loss.
First of all, he's been well known for wrapping his arms around various conspiracy theories even when there is absolutely no evidence present (see his Joe Scarborough tweets). For example, he claims that he actually won the popular vote in 2016 and that it was election fraud that denied him that victory even though he lost by over 2% and nearly 3 million votes.
Secondly, recently he's been sowing the seeds of his possible, or some might say probable, questioning the validity of the vote by making accusations that the Democrats are at work trying to rig the election:
First he lit into Michigan and Nevada, threatening to withhold federal funding because of his assertion that both states were preparing to commit voter fraud through mail-in ballot applications. Then President Donald Trump followed up Sunday with two more broadly worded warnings that November would be “the greatest Rigged Election in history.”
“The Democrats are trying to Rig the 2020 Election, plain and simple!”
And thirdly, we all know of Trump's reluctance to admit to any kind of personal failing, and certainly losing a Presidential election, particularly a re-election, can be a devastating personal blow to ego driven politicians that would have never embarked on a campaign for POTUS if not for the presence of a very prominent self esteem, as both Jimmy Carter and George HW Bush could attest to. Trump's ego defense mechanism, his inner voice that protects him from having to admit to himself that he's failed, would kick in and cause him to displace the blame on someone or something else.
The next question would be if Trump loses and starts claiming election fraud, what would the transition of power look like? How would he behave during the 2.5 months between election night and the inauguration of the new President? Would he try to maintain power?
First of all, he's been well known for wrapping his arms around various conspiracy theories even when there is absolutely no evidence present (see his Joe Scarborough tweets). For example, he claims that he actually won the popular vote in 2016 and that it was election fraud that denied him that victory even though he lost by over 2% and nearly 3 million votes.
Secondly, recently he's been sowing the seeds of his possible, or some might say probable, questioning the validity of the vote by making accusations that the Democrats are at work trying to rig the election:
First he lit into Michigan and Nevada, threatening to withhold federal funding because of his assertion that both states were preparing to commit voter fraud through mail-in ballot applications. Then President Donald Trump followed up Sunday with two more broadly worded warnings that November would be “the greatest Rigged Election in history.”
“The Democrats are trying to Rig the 2020 Election, plain and simple!”
And thirdly, we all know of Trump's reluctance to admit to any kind of personal failing, and certainly losing a Presidential election, particularly a re-election, can be a devastating personal blow to ego driven politicians that would have never embarked on a campaign for POTUS if not for the presence of a very prominent self esteem, as both Jimmy Carter and George HW Bush could attest to. Trump's ego defense mechanism, his inner voice that protects him from having to admit to himself that he's failed, would kick in and cause him to displace the blame on someone or something else.
The next question would be if Trump loses and starts claiming election fraud, what would the transition of power look like? How would he behave during the 2.5 months between election night and the inauguration of the new President? Would he try to maintain power?