and his team listen to the community's feedback and offer, within a window of three years, two fantastic, insightful and impactful forecasting competitions, the M4 and M5. I am tired with all the "sceptics" that try to dismiss the competitions' results.
1/8

First, the ongoing discussion on error measures. It seems that everyone in the forecasting community has devised their own measures, and if someone is using another one then s/he is doomed. The real question is: does the chosen error measure fit the purpose of the exercise?
2/8
Second, the disbelief on the results especially from people that did not participate in the competitions. I have said that before, but skin in the game is important in forecasting (if you want to call your self a forecaster).
3/8
The fact that a method won a competition does not mean that it will win all future competitions. But, there are important lessons to be learnt. In the case of M3 and Theta: the value of information decomposition. In the case of M4 & M5: the value of cross-learning.
4/8
Such insights should be taken into account when designing future methods and algorithms. Since 2000, I have seen many new implementations of the Theta method that have improved on the original proposition. The same will surely be the case with the top methods of M4 & M5.
5/8
Third, the inability to understand the inherent limitations of designing a forecasting competition. No forecasting competition is going to be perfect. The same way that no RCT experiment will fully reflect reality. But, this does not mean that each competition does not add...
6/8
...to our understanding of forecasting. If the father of forecasting, @spyrosmakrid himself, has changed his view towards "complex" methods and saw the value of ML methods, this should be a paradigm for everyone else in the community.
7/8
I am not affiliated with the Makridakis Open Forecasting Centre, but its motto says it all: "Learn. Forecast. Compete. Disseminate. Excel." @spyrosmakrid
I invite others to do the same.
8/8
@threadreaderapp
#unroll

More from Society

The UN just voted to condemn Israel 9 times, and the rest of the world 0.

View the resolutions and voting results here:

The resolution titled "The occupied Syrian Golan," which condemns Israel for "repressive measures" against Syrian citizens in the Golan Heights, was adopted by a vote of 151 - 2 - 14.

Israel and the U.S. voted 'No'
https://t.co/HoO7oz0dwr


The resolution titled "Israeli practices affecting the human rights of the Palestinian people..." was adopted by a vote of 153 - 6 - 9.

Australia, Canada, Israel, Marshall Islands, Micronesia, and the U.S. voted 'No' https://t.co/1Ntpi7Vqab


The resolution titled "Israeli settlements in the Occupied Palestinian Territory, including East Jerusalem, and the occupied Syrian Golan" was adopted by a vote of 153 – 5 – 10.

Canada, Israel, Marshall Islands, Micronesia, and the U.S. voted 'No'
https://t.co/REumYgyRuF


The resolution titled "Applicability of the Geneva Convention... to the
Occupied Palestinian Territory..." was adopted by a vote of 154 - 5 - 8.

Canada, Israel, Marshall Islands, Micronesia, and the U.S. voted 'No'
https://t.co/xDAeS9K1kW
The Nashville Operation - A Battle in the War

A thread exploring the Nashville bombing in the context of the 2020 Digital War (via SolarWinds) against the United States perpetrated by our enemies, likely China, Iran and/or Russia.


SolarWinds Hack

A digital "Pearl Harbor" moment for the United States, whoever was responsible had access to the keys to the kingdom for months during 2020, including sensitive military infrastructure. This is war!

SunGard + SolarWinds

SolarWinds software company is owned by same company that owns SunGard, which essentially provides data center services. A secure place to host internet servers with redundant power and "big pipe" data connections.

https://t.co/U3P3SrrkM1


SunGard Data Center

In Nashville, around the corner from their "big pipe" connection, AT&T. Like any data center, highly secure. Only authorized personnel can enter, and even fewer can access the actual server rooms. Backup generators are available in case of power failure.


If the SunGard hardware was being used to "host" critical command and control software related to SolarWinds, the US powers would be very interested in gaining special access keys that are stored on the hard-drives of specific servers.
Brief thread to debunk the repeated claims we hear about transmission not happening 'within school walls', infection in school children being 'a reflection of infection from the community', and 'primary school children less likely to get infected and contribute to transmission'.

I've heard a lot of scientists claim these three - including most recently the chief advisor to the CDC, where the claim that most transmission doesn't happen within the walls of schools. There is strong evidence to rebut this claim. Let's look at


Let's look at the trends of infection in different age groups in England first- as reported by the ONS. Being a random survey of infection in the community, this doesn't suffer from the biases of symptom-based testing, particularly important in children who are often asymptomatic

A few things to note:
1. The infection rates among primary & secondary school children closely follow school openings, closures & levels of attendance. E.g. We see a dip in infections following Oct half-term, followed by a rise after school reopening.


We see steep drops in both primary & secondary school groups after end of term (18th December), but these drops plateau out in primary school children, where attendance has been >20% after re-opening in January (by contrast with 2ndary schools where this is ~5%).

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