Anecdotal data: my wife and I got COVID twice 9 months apart last year. The second time my wife ended up in the hospital.
939 karma · joined May 5, 2014
Anecdotal data: my wife and I got COVID twice 9 months apart last year. The second time my wife ended up in the hospital.
We both got vaccinated as soon as we could.
That's why Yellen is proposing a global minimum corporate tax.
Strike is promising a lot (which is exciting!) but don't have a fully functional product yet.
70% is still a great effectiveness rate, specially for a cheaper and easier to distribute vaccine.
The argument is that Apple is using their market power to set prices that seems well above the marginal cost. And they also have created policies that prevent competition in their store. Imagine Windows not allowing any apps unless they give them a 30% cut.
But, even if you highlight the assumption, for most people it is not straightforward how to use this information.
Because there is competition. If there was one or two car manufacturers following similar practices you have no alternative.
Some people say "if don't like it build your own phone". Well, that's like asking a bar to be a car manufacturer to be able to sell food and drinks.
In both crisis he mentioned stagflation, which can happen when there is a supply shock (like oil prices increasing) and governments growing the money supply too quickly. Now we are suffering a supply shock but also a big demand shock (just look at oil prices...) which makes the situation different. This doesn't mean that inflation won't increase once the first stage of the crisis is over (specially in food, which will impact developing countries the most), but I think it is far from the most important thing to worry about right now.
The fit on the left seems too good to be true. It could be that it using the outcome (Tesla's stock price) as part of the calibration, which biases your synthetic control. In ML speak it is an overfitted model. http://www.oekonometrie.uni-saarland.de/papers/SCM_Predictor....
Also, in the package documention it says "The model also assumes that the relationship between covariates and treated time series, as established during the pre-period, remains stable throughout the post-period". In this case the covariate is the S&P500, so clearly the relationship didn't stay stable. As you mention, there was a dip in every tech company.
This doesn't mean that Musk's tweet didn't affect the price, but this is no proof.
"This study had several limitations. First, our sampling strategy selected for members of Santa Clara County with access to Facebook and a car to attend drive-through testing sites. This resulted in an over-representation of white women between the ages of 19 and 64, and an under-representation of Hispanic and Asian populations, relative to our community. Those imbalances were partly addressed by weighting our sample population by zip code, race, and sex to match the county. We did not account for age imbalance in our sample, and could not ascertain representativeness of SARS-CoV-2 antibodies in homeless populations. Other biases, such as bias favoring individuals in good health capable of attending our testing sites, or bias favoring those with prior COVID-like illnesses seeking antibody confirmation are also possible. The overall effect of such biases is hard to ascertain."