In order to provide a methodology to detect bubbles in time series, Phillips, Wu, and Yu [23] proposed the supremum augmented Dickey-Fuller (SADF) test. This applies a series of right-tailed unit root tests to expanding windows of a time series (with a fixed start date), defined by where r2 is the final data point to be considered in each window, starting at r0 which is a fraction representing the smallest allowed window size and expanding to 1(the complete data set).
Various factors can be used to monitor usage of a subreddit. Due to the promising trading strategy generated from the factors chosen in [7], these same factors will be examined here. Posts per day indicates the number of posts made on a particular subreddit, per day. (this factor does not include comments made in response to particular posts). Subscriber growth indicates the number of new subscribers that a subreddit receives, per day. New authors indicates the number of new authors posting on a particular subreddit, per day. This current work will aim to confirm the relationship the factors identified have with price in a model-free environment, rather than with the use of a trading strategy which can potentially introduce ambiguity relating to individual factor contributions.

The majority of the crypto currency market saw prices crash once more on the morning of 22 June following China’s clampdown on digital currencies.
To create utility for Token, EverGrow is also developing an adult content subscription. Users can use $EGC to purchase content, tip content producers, and communicate with content creators on the forum. EverGrow already launches the Platforms' Beta. Rewards in USDT ensure that Curators can keep earning stable income without selling their $EverGrow holdings. Onboarding more creators as Holders will mean less token in circulations and making EGC scarce day by day, thus making it one step closer to the next Big Cryptocurrency.