Ofir Reich
133 posts
Ofir Reich
@OfirReich
Data Scientist. Africa enthusiast.
Katılım Mart 2017
47 Takip Edilen197 Takipçiler
@SpencrGreenberg Classifying images to cats vs. dogs - which is "positive"? I favor naming the classes explicitly. "False Dog", "False cat".
English
Statistics is hard enough for most people as it is; please stop using the phrases "type I" and "type II" errors.
Unless, of course, your goal is to confuse people - in which case, congrats - you've succeeded!
Just say "false positive" and "false negative" instead.
English
Implications.
Model accuracy is not enough. Field evaluation is necessary to determine real-world impact on existing system.
Other ICT solutions to lubricate enforcement action and collaboration within the department may be beneficial.
Paper again:
dl.acm.org/doi/abs/10.114…
English
How come no treatment effect?
A) Overfitting to proxy-labels. Model predicts firms already on a trajectory to be canceled, e.g. haven’t filed returns for months.
B) Lacking department enforcement. Firms non-existent in inspections, likely not canceled more than 1 year later.
English
“Is Model Accuracy Enough? A Field Evaluation Of A Machine Learning Model To Catch Bogus Firms.”
New paper: #MachineLearning model accuracy need not translate to causal impact.
W/ Taha Barwahwala, @aprajitmahajan, @shekhar_m. 🙏 @JPAL_SA 🙏 @ICTDTax.
dl.acm.org/doi/abs/10.114…
🧵
English
The letter combination "ough" is pronounced in 6 different ways in these 6 words:
Bough
Ought
Though
Through
Cough
Rough
1) Are there any other pronunciations of "ough"?
2) Is there any other 3 or 4 letter combination with more pronunciations?
English
If the rocket which landed in Poland (red circle) was the result of incorrect targeting, the operator may have input the latitude of a target in Kyiv (blue), and the longitude of one in Lviv (blue).
I wonder if other missiles have ever landed at the other red circle?
English
Then read this page for examples and how to use:
plotly.com/python/plotly-…
Advantages:
- Great integration with pandas
- Interactive plots
- Lots of plot types
- Great interface for multiple dimensions: small multiples, colors, markers, sizes, dashes.
English
Using matplotlib? Move to @plotly express right now.
! pip install plotly
import plotly
import plotly.express as px
plotly.io.renderers.default = 'colab'
plotly.io.templates.default = "plotly_white"
pd.options.plotting.backend = "plotly"
English
Come work with me to use ML to fight tax evasion in India. Great position to get hands-on experience with data science and Machine Learning, for early-mid career Indian nationals.
J-PAL South Asia@JPAL_SA
#HIRING: Data Research Associate to work w/ @aprajitmahajan & @shekhar_m Apply to leverage #DataScience & #MachineLearning skills for a project which aims to iteratively detect bogus firms, working closely w/ a state commercial tax department: j-p.al/dra-ml #EconJobs
English
Come work with me on a cool and important data project in India!
If you're Indian and want to learn data science & ML hands-on, this could be a good opportunity for you. Apply!
J-PAL South Asia@JPAL_SA
#HIRING: Data Research Associate to work w/ @aprajitmahajan & @shekhar_m Apply to leverage #DataScience & #MachineLearning skills for a project which aims to iteratively detect bogus firms, working closely w/ a state commercial tax department: j-p.al/dra-ml #EconJobs
English
Ofir Reich retweetledi
This 1881 map is an amazing work that shows the travel time from London to... everywhere. Not only is it one of the first isochronic maps (marking distances that could be traveled in the same time) but it drew on steamship tables, post office records, and private voyage records.
English
Star Control II (the classic game) is available on many linux distributions!
sudo apt-get install uqm
uqm
(also on many other platforms: sc2.sourceforge.net/downloads.php)
English
Ofir Reich retweetledi
Exciting opportunity for folks interested in having an impact at the intersection of public policy and machine learning! As an additional benefit, you also get to work with amazingly kind mentors in @aprajitmahajan, @OfirReich, and me ;). Please share!
Aprajit Mahajan@aprajitmahajan
Hi! Looking for a RA (J-PAL South Asia) for a project using machine learning to improve tax systems (India based). Application link tinyl.io/482s. Pls. contact suddhasatwa.bhattacharya@ifmr.ac.in for any questions. Thanks!
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I thoroughly enjoy @bryan_caplan's books:
The Myth of The Rational Parent
The Case Against Voters
Selfish Reasons to Open Borders: Why Immigrants are Less Work and More Fun Than You Think.
Sheepskin: The Science and Ethics of Education
English