Oops, that's what I get for mathing before coffee-- mixed up the formula for \sum (1+r)^n vs. \sum r^n
It may be "free money" as you frame it. But a cash stream that provides n dollars per year forever can be valued in today's dollars, assuming a discount rate of d, at n / (1-d). So it's reasonable to prefer cash now to…
Tons of comments already in the direction of 'eat less' and 'exercise more'. Of course. One thing I've found extremely helpful is to cook more! WFH is amazing for this. If you can find 15 minutes of meeting time…
When you say tech industry pays more, I'm assuming the effective long-run hourly earnings of poker players is way less glamorous than it looks from an outsider seeing highlights? Doing a basic google search led me to…
It's interesting to compare this to the physical-world analog. What if somebody shows up at the US-Canada border, start shooting rockets at Canada, and the US refuses to acknowledge this as a crime or extradite? What if…
See Matt Levine's 10 laws of insider trading. In particular, "5. Don’t do it by planting bombs at a company and shorting its stock." Somebody nicely put a non-paywall link here:…
I started looking at the map in the article and realized I had just booked a flight where there was an existing rail line ! So I checked out the Amtrak site, and what's 1h20m by plane is 14h40m by train -- and 8h by…
As an employee at a megacorp, sure, you can see a little bit about how things are going from the inside. That said, you probably spend less time looking at reports than professional analysts. Secondly, sure, maybe you…
As somebody with some ML background but no expertise in crypto, is the following ELI~20 summary correct? We take an ML model trained on unencrypted data, use a 'homomorphic evaluation' technique (let's just leave that…
Any good references on the art part, or is it just an intuition you develop over time? In my experience, all the ML education will teach you a ton of theory and basics but none of the practical details you're referring…
Sure, Wiles obviously understands the main thrust of his proof. But one could argue that Wiles' result depends on lots of other results, which in turn depend on other results, and so on through decades and decades of…
Tipping is a form of price discrimination, which generally makes things more efficient and has been a staple of capitalism since forever. A business actively wants to extract more money from customers who can afford…
It does change something. DoorDash's old policy, weird as it is, reduces variability of daily pay for the Dashers. It literally put a derivative structure onto the Dasher pay that reduces volatility -- the pay was cash…
This comparison isn't so great because of the following: for product_id in unique_products: product_items = [x for x in dataset_python if x[0]==product_id ] This is O(unique_products * observations), and it looks like…
Sure, and what about skittish Groupon employees?
Right. Airlines overbook because they make more money, and they are bound by laws like "If the substitute transportation is scheduled to get you to your destination more than two hours later (four hours…
When you get a PhD, you mainly only take classes in your department for the whole time, whereas in undergrad you still have classes in other fields. This usually extends beyond coworkers into friend circles too. This…
With pizza, your solution can't work. You have to pay the driver base pay, and they get tips on top. So the base pay has to come from the menu price + delivery fee, and if you get rid of the delivery fee, it has to come…
Every article on salaries seems to really screw up two things. One is, salary is only a portion of total compensation. Which do they mean here? If you don't look at equity packages, my intuition is you're going to think…
A philosophy class teaching fundamentals in logic - taught in a way similar to math - is probably more like math in the sense of the article than philosophy in the sense of the grandparent post. The grandparent probably…
Math classes ramp up in a gradual way that develops critical thinking and intuition in a very small sandbox, where it's easier to appreciate the results. Thinking in, say, just the x-y plane makes it far easier to…
Pytz handles a certain class of funkiness in TZ changes, but not the one mentioned here. Consider, a user in footopia enters a datetime 3 months from now which is saved in UTC in your database. Then footopia changes…
Sure, I forgot the self-join case. In my experience these are a minority of joins, but definitely. In postgres at least, a lot of self-joins can be solved with a DISTINCT ON instead. Sub-selection with a FROM clause,…
Weird, I really dislike a lot of the suggestions. In particular, an example: SELECT first_name AS fn FROM staff AS s1 JOIN students AS s2 ON s2.mentor_id = s1.staff_num; We already agreed that staff is a good name for a…
In this instance, Uber is making public transportation _more_ accessible. They are crowding out people driving from home to a parking lot. Anyway, the article mentions this is maybe ten to a hundred rides a day. This is…
Oops, that's what I get for mathing before coffee-- mixed up the formula for \sum (1+r)^n vs. \sum r^n
It may be "free money" as you frame it. But a cash stream that provides n dollars per year forever can be valued in today's dollars, assuming a discount rate of d, at n / (1-d). So it's reasonable to prefer cash now to…
Tons of comments already in the direction of 'eat less' and 'exercise more'. Of course. One thing I've found extremely helpful is to cook more! WFH is amazing for this. If you can find 15 minutes of meeting time…
When you say tech industry pays more, I'm assuming the effective long-run hourly earnings of poker players is way less glamorous than it looks from an outsider seeing highlights? Doing a basic google search led me to…
It's interesting to compare this to the physical-world analog. What if somebody shows up at the US-Canada border, start shooting rockets at Canada, and the US refuses to acknowledge this as a crime or extradite? What if…
See Matt Levine's 10 laws of insider trading. In particular, "5. Don’t do it by planting bombs at a company and shorting its stock." Somebody nicely put a non-paywall link here:…
I started looking at the map in the article and realized I had just booked a flight where there was an existing rail line ! So I checked out the Amtrak site, and what's 1h20m by plane is 14h40m by train -- and 8h by…
As an employee at a megacorp, sure, you can see a little bit about how things are going from the inside. That said, you probably spend less time looking at reports than professional analysts. Secondly, sure, maybe you…
As somebody with some ML background but no expertise in crypto, is the following ELI~20 summary correct? We take an ML model trained on unencrypted data, use a 'homomorphic evaluation' technique (let's just leave that…
Any good references on the art part, or is it just an intuition you develop over time? In my experience, all the ML education will teach you a ton of theory and basics but none of the practical details you're referring…
Sure, Wiles obviously understands the main thrust of his proof. But one could argue that Wiles' result depends on lots of other results, which in turn depend on other results, and so on through decades and decades of…
Tipping is a form of price discrimination, which generally makes things more efficient and has been a staple of capitalism since forever. A business actively wants to extract more money from customers who can afford…
It does change something. DoorDash's old policy, weird as it is, reduces variability of daily pay for the Dashers. It literally put a derivative structure onto the Dasher pay that reduces volatility -- the pay was cash…
This comparison isn't so great because of the following: for product_id in unique_products: product_items = [x for x in dataset_python if x[0]==product_id ] This is O(unique_products * observations), and it looks like…
Sure, and what about skittish Groupon employees?
Right. Airlines overbook because they make more money, and they are bound by laws like "If the substitute transportation is scheduled to get you to your destination more than two hours later (four hours…
When you get a PhD, you mainly only take classes in your department for the whole time, whereas in undergrad you still have classes in other fields. This usually extends beyond coworkers into friend circles too. This…
With pizza, your solution can't work. You have to pay the driver base pay, and they get tips on top. So the base pay has to come from the menu price + delivery fee, and if you get rid of the delivery fee, it has to come…
Every article on salaries seems to really screw up two things. One is, salary is only a portion of total compensation. Which do they mean here? If you don't look at equity packages, my intuition is you're going to think…
A philosophy class teaching fundamentals in logic - taught in a way similar to math - is probably more like math in the sense of the article than philosophy in the sense of the grandparent post. The grandparent probably…
Math classes ramp up in a gradual way that develops critical thinking and intuition in a very small sandbox, where it's easier to appreciate the results. Thinking in, say, just the x-y plane makes it far easier to…
Pytz handles a certain class of funkiness in TZ changes, but not the one mentioned here. Consider, a user in footopia enters a datetime 3 months from now which is saved in UTC in your database. Then footopia changes…
Sure, I forgot the self-join case. In my experience these are a minority of joins, but definitely. In postgres at least, a lot of self-joins can be solved with a DISTINCT ON instead. Sub-selection with a FROM clause,…
Weird, I really dislike a lot of the suggestions. In particular, an example: SELECT first_name AS fn FROM staff AS s1 JOIN students AS s2 ON s2.mentor_id = s1.staff_num; We already agreed that staff is a good name for a…
In this instance, Uber is making public transportation _more_ accessible. They are crowding out people driving from home to a parking lot. Anyway, the article mentions this is maybe ten to a hundred rides a day. This is…