Hello and welcome to the Intelligence on Economist Radio.

I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

You can buy just about anything online, but only a small fraction of online shoppers get

their groceries delivered.

It's a business with sticky logistics and paper thin margins, but e-grossers big and small

are battling it out to drop off your weekly shop.

And it used to be that a breakout album could spend years on the charts.

These days, not so much.

Albums that come in as chart toppers are gone from the list faster than ever.

And those that don't hit number one with a bullet, never get there.

But first...

The public stage of impeachment proceedings against President Donald Trump is entering its second week.

The question of whether Mr. Trump tried to coax his Ukrainian counterparts into investigating

a political rival by withholding military aid is dominating Washington.

After two days of testimony last week in front of the cameras, come three more.

Eight witnesses are due to be heard this week.

The hearings are absorbing an enormous amount of attention in Washington.

John Fasmin is our Washington correspondent.

I went up to the hill on the first day, last Wednesday, and I arrived at what I thought

was a prudent two hours early.

In the line outside, the Ways and Means Committee room already stretched all the way down the hall.

...